The three of Dan. 7:4-6 are the three of Rev. 13:2. And the fourth in Dan. 7:7 is the dragon of Rev. 12:3 that is called the mouth of the beast in Rev. 13:4-8
a) 4And they worshipped the dragon (this is the false prophet of Rev. 13:11 that is Pope Leo)
which gave power unto the beast (he gave power to the beast in Rev. 13:2)
:
and they worshipped the beast (as directed in Rev. 13:12-17)
saying, Who is like unto the beast? who is able to make war with him?
b) 5And there was given unto him a mouth (this mouth is the false prophet of Rev. 13:11 that is Pope Leo)
speaking great things and blasphemies (Blasphemy is the name of the false prophet Pope Leo and is referenced in Rev. 13:1)
;
and power was given unto him to continue forty and two months.
c) 6And he opened his mouth (Pope Leo)
in blasphemy against God, to blaspheme his name, and his tabernacle, and them that dwell in heaven.
b) 7And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues, and nations.
a) 8And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.
The above chiasmus in Rev. 13:4-8 is about the fourth beast of Dan. 7:7.