Finding the Fourth Proportional to 72,359.28, 99,856.80 and 40,527.92

Step by Step Solution

1. Step 1: Write the proportion equation
   72,359.28 : 99,856.80 = 40,527.92 : x
2. Step 2: Convert to fraction form
   72,359.28/99,856.80 = 40,527.92/x
3. Step 3: Cross multiply
   72,359.28x = 99,856.80 × 40,527.92
4. Step 4: Simplify right side
   72,359.28x = 4,046,988,401.86
5. Step 5: Solve for x
   x = 4,046,988,401.86/72,359.28
6. Step 6: Final answer
   x = 55,929.09