Finding the Fourth Proportional to 72,229.32, 99,688.32 and 40,406.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,229.32 : 99,688.32 = 40,406.04 : x
2. Step 2: Convert to fraction form
   72,229.32/99,688.32 = 40,406.04/x
3. Step 3: Cross multiply
   72,229.32x = 99,688.32 × 40,406.04
4. Step 4: Simplify right side
   72,229.32x = 4,028,010,245.45
5. Step 5: Solve for x
   x = 4,028,010,245.45/72,229.32
6. Step 6: Final answer
   x = 55,766.97