Finding the Fourth Proportional to 72,391.92, 99,910.71 and 40,567.56

Step by Step Solution

1. Step 1: Write the proportion equation
   72,391.92 : 99,910.71 = 40,567.56 : x
2. Step 2: Convert to fraction form
   72,391.92/99,910.71 = 40,567.56/x
3. Step 3: Cross multiply
   72,391.92x = 99,910.71 × 40,567.56
4. Step 4: Simplify right side
   72,391.92x = 4,053,133,722.57
5. Step 5: Solve for x
   x = 4,053,133,722.57/72,391.92
6. Step 6: Final answer
   x = 55,988.76