Finding the Fourth Proportional to 72,088.27, 99,480.77 and 40,257.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,088.27 : 99,480.77 = 40,257.61 : x
2. Step 2: Convert to fraction form
   72,088.27/99,480.77 = 40,257.61/x
3. Step 3: Cross multiply
   72,088.27x = 99,480.77 × 40,257.61
4. Step 4: Simplify right side
   72,088.27x = 4,004,857,839.87
5. Step 5: Solve for x
   x = 4,004,857,839.87/72,088.27
6. Step 6: Final answer
   x = 55,554.92