Finding the Fourth Proportional to 71,706.69, 98,953.92 and 39,875.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,706.69 : 98,953.92 = 39,875.31 : x
2. Step 2: Convert to fraction form
   71,706.69/98,953.92 = 39,875.31/x
3. Step 3: Cross multiply
   71,706.69x = 98,953.92 × 39,875.31
4. Step 4: Simplify right side
   71,706.69x = 3,945,818,235.72
5. Step 5: Solve for x
   x = 3,945,818,235.72/71,706.69
6. Step 6: Final answer
   x = 55,027.20