Finding the Fourth Proportional to 72,155.55, 99,563.50 and 40,318.29

Step by Step Solution

1. Step 1: Write the proportion equation
   72,155.55 : 99,563.50 = 40,318.29 : x
2. Step 2: Convert to fraction form
   72,155.55/99,563.50 = 40,318.29/x
3. Step 3: Cross multiply
   72,155.55x = 99,563.50 × 40,318.29
4. Step 4: Simplify right side
   72,155.55x = 4,014,230,066.42
5. Step 5: Solve for x
   x = 4,014,230,066.42/72,155.55
6. Step 6: Final answer
   x = 55,633.00