Description of the four kingdoms: a) The head of the statue was made of pure gold which represents the Babylonian Empire; it is unstable and heavy beginning with the head. (606-539 B.C) b) This statue in Daniel’s interpretation is followed by a chest with arms of silver which represent the Medo-Persian noted as a “dual empire”. (539-331 B.C.) c) The third kingdom is preceded by the belly and its thighs of bronze which represent the Grecian Empire. (331-323 B.C.) d) Another kingdom which follows is the Empire of Rome which signifies the legs of iron in Daniels’ dream as he interprets the dream of Nebuchadnezzar. It also has it feet and toes partly baked clay and partly of iron, which represents a divided kingdom
It is important to note that beginning with the head of gold to the legs made of iron and feet and toes partly baked of clay and iron are deteriorating in fineness, but do increase in strength.
There is division in these kingdoms which represent the two legs (eastern and western empires) and these are once again divided into kingdoms which represent the ten kingdoms that the Stone strikes (Second Coming of Christ).

In chapter 7 of Daniel has another dream which is given to him of four world empires. a) The lion had wings of an eagle, yet its wings were torn off and it was lifted from the ground so that it stood on two feet like a man, and the heart of a man was given to it. This represents the Empire of Babylon. b) The second Empire was the Medo-Persia which looked like a bear. It was raised up on one of its sides (had more strength on one side than the other), and it had three ribs (3 Kingdoms), in its mouth between its teeth. c) The third Empire represents Greece as being like a leopard with four wings on its back like those of a bird. This beast had four heads, and it was given authority to rule. (Symbolizes the 4 generals of Alexander the Great that divided his kingdom). Generals are as followed: Antigonus, Ptolemy, Lysimascus & Cassander) d) The fourth Empire is Rome which is represented by a terrifying, frightening and powerful beaste which large iron teeth which crushed all. This beast was difference than all the former beast, and it had ten horns.
One like the Son of Man:
This signifies Jesus Christ as having authority and sovereign power over all people, nations and men of every language. His dominion is everlasting and one which will never pass away nor destroyed.
This is the same “rock” that was cut out of the statue that struck the statue on its feet of iron and clay. It became a huge mountain (kingdom) which filled the whole earth.
The Ram and Goat:
Chapter 8 in the book of Daniel is teaches us that he was given a dream of a ram and goat. The ram had two horns yet one of the horns grew up later. This ram charged toward the west, north and south which mean he is charging from the east, he became great. A goat with a prominent horn between his eyes came from the west. This goat charged at the Ram breaking off his two horns which caused the ram to become powerless. His large horn (Alexander the great) was broken off, and in its place grew four prominent horns (4 generals that divided Alexander’s kingdom). This should not be confused with the little horn which is to come during the tribulation period, it concerns the time of the end.

References:
Holy Bible Scotfield Study System: NIV Oxford 2004 Edition
Miller, Stephen R. The New American Commentary Volume 18 Daniel, B&H Publishing Group, Nashville, Tennessee 1994