Finding the Fourth Proportional to 111.10, 153.24 and 72.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111.10 : 153.24 = 72.25 : x
2. Step 2: Convert to fraction form
   111.10/153.24 = 72.25/x
3. Step 3: Cross multiply
   111.10x = 153.24 × 72.25
4. Step 4: Simplify right side
   111.10x = 11,071.59
5. Step 5: Solve for x
   x = 11,071.59/111.10
6. Step 6: Final answer
   x = 99.65