How did you install it onto the PC?
From a DVD?
From a floppy disk?
What you might try (no promises):
Go to the PC
Connect the Quicken install disk/DVD, then...
Plug in a USB flashdrive.
Copy the contents of the Dell install disk to the flashdrive.
Take the flashdrive to the Mac, and see if it can be installed that way.
But isn't there a new Mac version of Quicken you could use instead?