Finding the Fourth Proportional to 109,311.20, 150,856.80 and 82,406.24

Step by Step Solution

1. Step 1: Write the proportion equation
   109,311.20 : 150,856.80 = 82,406.24 : x
2. Step 2: Convert to fraction form
   109,311.20/150,856.80 = 82,406.24/x
3. Step 3: Cross multiply
   109,311.20x = 150,856.80 × 82,406.24
4. Step 4: Simplify right side
   109,311.20x = 12,431,541,666.43
5. Step 5: Solve for x
   x = 12,431,541,666.43/109,311.20
6. Step 6: Final answer
   x = 113,726.15