Finding the Fourth Proportional to 71,290.52, 98,379.72 and 39,458.73

Step by Step Solution

1. Step 1: Write the proportion equation
   71,290.52 : 98,379.72 = 39,458.73 : x
2. Step 2: Convert to fraction form
   71,290.52/98,379.72 = 39,458.73/x
3. Step 3: Cross multiply
   71,290.52x = 98,379.72 × 39,458.73
4. Step 4: Simplify right side
   71,290.52x = 3,881,938,808.96
5. Step 5: Solve for x
   x = 3,881,938,808.96/71,290.52
6. Step 6: Final answer
   x = 54,452.39