Finding the Fourth Proportional to 72,385.61, 99,896.22 and 40,564.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,385.61 : 99,896.22 = 40,564.76 : x
2. Step 2: Convert to fraction form
   72,385.61/99,896.22 = 40,564.76/x
3. Step 3: Cross multiply
   72,385.61x = 99,896.22 × 40,564.76
4. Step 4: Simplify right side
   72,385.61x = 4,052,265,689.73
5. Step 5: Solve for x
   x = 4,052,265,689.73/72,385.61
6. Step 6: Final answer
   x = 55,981.65