Finding the Fourth Proportional to 109.43, 150.96 and 72.61

Step by Step Solution

1. Step 1: Write the proportion equation
   109.43 : 150.96 = 72.61 : x
2. Step 2: Convert to fraction form
   109.43/150.96 = 72.61/x
3. Step 3: Cross multiply
   109.43x = 150.96 × 72.61
4. Step 4: Simplify right side
   109.43x = 10,961.95
5. Step 5: Solve for x
   x = 10,961.95/109.43
6. Step 6: Final answer
   x = 100.17