Finding the Fourth Proportional to 72,234.40, 99,688.56 and 40,406.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,234.40 : 99,688.56 = 40,406.24 : x
2. Step 2: Convert to fraction form
   72,234.40/99,688.56 = 40,406.24/x
3. Step 3: Cross multiply
   72,234.40x = 99,688.56 × 40,406.24
4. Step 4: Simplify right side
   72,234.40x = 4,028,039,880.61
5. Step 5: Solve for x
   x = 4,028,039,880.61/72,234.40
6. Step 6: Final answer
   x = 55,763.46