Finding the Fourth Proportional to 71,290.83, 98,380.15 and 39,459.05

Step by Step Solution

1. Step 1: Write the proportion equation
   71,290.83 : 98,380.15 = 39,459.05 : x
2. Step 2: Convert to fraction form
   71,290.83/98,380.15 = 39,459.05/x
3. Step 3: Cross multiply
   71,290.83x = 98,380.15 × 39,459.05
4. Step 4: Simplify right side
   71,290.83x = 3,881,986,765.96
5. Step 5: Solve for x
   x = 3,881,986,765.96/71,290.83
6. Step 6: Final answer
   x = 54,452.82