Finding the Fourth Proportional to 72,061.80, 99,435.96 and 40,232.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,061.80 : 99,435.96 = 40,232.04 : x
2. Step 2: Convert to fraction form
   72,061.80/99,435.96 = 40,232.04/x
3. Step 3: Cross multiply
   72,061.80x = 99,435.96 × 40,232.04
4. Step 4: Simplify right side
   72,061.80x = 4,000,511,520.16
5. Step 5: Solve for x
   x = 4,000,511,520.16/72,061.80
6. Step 6: Final answer
   x = 55,515.01