Finding the Fourth Proportional to 72,214.73, 99,665.61 and 40,385.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,214.73 : 99,665.61 = 40,385.42 : x
2. Step 2: Convert to fraction form
   72,214.73/99,665.61 = 40,385.42/x
3. Step 3: Cross multiply
   72,214.73x = 99,665.61 × 40,385.42
4. Step 4: Simplify right side
   72,214.73x = 4,025,037,519.41
5. Step 5: Solve for x
   x = 4,025,037,519.41/72,214.73
6. Step 6: Final answer
   x = 55,737.07