After having ridden Amtrak from Philadelphia to Seattle, I gathered some information on the consists.
Pennsylvanian (I rode from Philly to Pittsburgh) One P42DC, 5 Amfleet Coaches, one Cafe Car
Capitol Limited (Pittsburgh to Chicago) Two P42DC’s, One Baggage car, three coaches, one Lounge Cafe, one Dining Car, three Sleeping Cars all Superliners
Empire Builder (Chicago to Spokane) In order: Two P42DC’s, one Baggage Car, one Transition Sleeper, two Sleeping Cars, one Dining Car, one Coach, one Coach-Baggage, one Lounge-Cafe, one Coach, one Coach Baggage, one Sleeping Car all Superliners.
After the split in Spokane, the Lounge -Cafe on back went to Portland, the rest to Seattle.