Answer:
1.

2.

3.

4.

-1 1/3 is the least of all the numbers. So, this is the first number.
-1 1/2 is the second least number. So, this is the second number.
1 1/2 is the third least number. So, this is the third number.
Finally, 1 3/4 is the greatest number, so it is the fourth number.
Hope this helps you!