Finding the Fourth Proportional to 111.30, 153.49 and 96.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111.30 : 153.49 = 96.72 : x
2. Step 2: Convert to fraction form
   111.30/153.49 = 96.72/x
3. Step 3: Cross multiply
   111.30x = 153.49 × 96.72
4. Step 4: Simplify right side
   111.30x = 14,845.55
5. Step 5: Solve for x
   x = 14,845.55/111.30
6. Step 6: Final answer
   x = 133.38