Finding the Fourth Proportional to 109.55, 151.24 and 72.76

Step by Step Solution

1. Step 1: Write the proportion equation
   109.55 : 151.24 = 72.76 : x
2. Step 2: Convert to fraction form
   109.55/151.24 = 72.76/x
3. Step 3: Cross multiply
   109.55x = 151.24 × 72.76
4. Step 4: Simplify right side
   109.55x = 11,003.10
5. Step 5: Solve for x
   x = 11,003.10/109.55
6. Step 6: Final answer
   x = 100.44