Finding the Fourth Proportional to 71,911.92, 99,238.59 and 40,080.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,911.92 : 99,238.59 = 40,080.18 : x
2. Step 2: Convert to fraction form
   71,911.92/99,238.59 = 40,080.18/x
3. Step 3: Cross multiply
   71,911.92x = 99,238.59 × 40,080.18
4. Step 4: Simplify right side
   71,911.92x = 3,977,500,550.15
5. Step 5: Solve for x
   x = 3,977,500,550.15/71,911.92
6. Step 6: Final answer
   x = 55,310.73