Finding the Fourth Proportional to 71,140.88, 98,173.72 and 39,309.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,140.88 : 98,173.72 = 39,309.10 : x
2. Step 2: Convert to fraction form
   71,140.88/98,173.72 = 39,309.10/x
3. Step 3: Cross multiply
   71,140.88x = 98,173.72 × 39,309.10
4. Step 4: Simplify right side
   71,140.88x = 3,859,120,380.55
5. Step 5: Solve for x
   x = 3,859,120,380.55/71,140.88
6. Step 6: Final answer
   x = 54,246.17