4578, 4587, 5478, 5487 are in descending order.
Step 1: Understand “descending”.
Descending order means numbers go down as we move right: biggest → smaller → smallest.
Step 2: Compare the first two numbers.
Look at 4578 and 4587.
Thousands: \(4 = 4\)
Hundreds: \(5 = 5\)
Tens: \(7 < 8\)
So, \(4578 < 4587\).
Step 3: Compare 4587 and 5478.
Thousands: \(4 < 5\)
So, \(4587 < 5478\).
Step 4: Compare 5478 and 5487.
Thousands: \(5 = 5\)
Hundreds: \(4 = 4\)
Tens: \(7 < 8\)
So, \(5478 < 5487\).
Step 5: Look at the whole list.
We found: \(4578 < 4587 < 5478 < 5487\).
The numbers are getting bigger from left to right. That is ascending order, not descending.
Conclusion: The statement is false. These numbers are in ascending order.