Finding the Fourth Proportional to 111.60, 153.59 and 101.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111.60 : 153.59 = 101.25 : x
2. Step 2: Convert to fraction form
   111.60/153.59 = 101.25/x
3. Step 3: Cross multiply
   111.60x = 153.59 × 101.25
4. Step 4: Simplify right side
   111.60x = 15,550.48
5. Step 5: Solve for x
   x = 15,550.48/111.60
6. Step 6: Final answer
   x = 139.34