CELLS
P5 is the original date and Q5 through T5 are cells for up to four
possible move dates (schedule changes). U5 is the target arrival date.

QUESTION
In U5, I want to show the most current target arrival date. If there
are no schedule changes, this would be P5, but if there is a schedule
slip, I want the most current date to appear. If the schedule slipped
once, this would be Q5; if the schedule has slipped three times, this
would be S5.

Is there a formula that could accomplish this task?

EXAMPLE1
P5 - 02/01/06
Q5 -
R5 -
S5 -
T5 -
U5 - 02/01/06

EXAMPLE2
P5 - 02/01/06
Q5 - 02/05/06
R5 - 02/10/06
S5 -
T5 -
U5 - 02/10/06

EXAMPLE3
P5 - 02/01/06
Q5 - 02/05/06
R5 - 02/10/06
S5 - 02/11/06
T5 - 02/15/06
U5 - 02/15/06