Finding the Fourth Proportional to 71,708.33, 98,947.89 and 39,871.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,708.33 : 98,947.89 = 39,871.10 : x
2. Step 2: Convert to fraction form
   71,708.33/98,947.89 = 39,871.10/x
3. Step 3: Cross multiply
   71,708.33x = 98,947.89 × 39,871.10
4. Step 4: Simplify right side
   71,708.33x = 3,945,160,722.24
5. Step 5: Solve for x
   x = 3,945,160,722.24/71,708.33
6. Step 6: Final answer
   x = 55,016.77