Finding the Fourth Proportional to 71,920.02, 99,250.92 and 40,085.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,920.02 : 99,250.92 = 40,085.50 : x
2. Step 2: Convert to fraction form
   71,920.02/99,250.92 = 40,085.50/x
3. Step 3: Cross multiply
   71,920.02x = 99,250.92 × 40,085.50
4. Step 4: Simplify right side
   71,920.02x = 3,978,522,753.66
5. Step 5: Solve for x
   x = 3,978,522,753.66/71,920.02
6. Step 6: Final answer
   x = 55,318.71