Finding the Fourth Proportional to 72,423.26, 99,943.78 and 40,592.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,423.26 : 99,943.78 = 40,592.15 : x
2. Step 2: Convert to fraction form
   72,423.26/99,943.78 = 40,592.15/x
3. Step 3: Cross multiply
   72,423.26x = 99,943.78 × 40,592.15
4. Step 4: Simplify right side
   72,423.26x = 4,056,933,057.71
5. Step 5: Solve for x
   x = 4,056,933,057.71/72,423.26
6. Step 6: Final answer
   x = 56,016.99