I was playing to day. I would like some help or correction on this ruling.

A buddy hit his drive and it hit he cartpath, then bounced it to an cart of the greens person. The ball stayed in the cart until the he reach the green and then fell to the ground. what rulimg would you use?

RULING #1-
The other two guy stated the the ball has to be play for were it hit the ground last. None of use took notice of were the ball hit exactly.

Ruling #2
An other foursome stated that the ball need to be played by the trajectory of the shot and detemine were the ball would had come to rest and play it from there. If the ball bounced were would it have gone? out of bounds was to the right and that was the direction the drive was going or could the ball had bounce and come to rest of the markers?

Ruling #3- Greens Keeper ruling
Play the ball a unplayable and rehit under rule 39?-??. Rehit with out penilty.

Ruling #4- My Ruling.
Play the ball were it came to rest. The reason for this the ball never came to rest with the ground until the cart stopped.

What would you say? How would you rule this?

My ruling cost me the December 1 Christmas tournament by 1 stroke. but the we won the foursome total score.