Finding the Fourth Proportional to 71,702.52, 98,949.56 and 39,870.73

Step by Step Solution

1. Step 1: Write the proportion equation
   71,702.52 : 98,949.56 = 39,870.73 : x
2. Step 2: Convert to fraction form
   71,702.52/98,949.56 = 39,870.73/x
3. Step 3: Cross multiply
   71,702.52x = 98,949.56 × 39,870.73
4. Step 4: Simplify right side
   71,702.52x = 3,945,190,991.03
5. Step 5: Solve for x
   x = 3,945,190,991.03/71,702.52
6. Step 6: Final answer
   x = 55,021.65