Finding the Fourth Proportional to 71,706.83, 98,945.82 and 39,869.60

Step by Step Solution

1. Step 1: Write the proportion equation
   71,706.83 : 98,945.82 = 39,869.60 : x
2. Step 2: Convert to fraction form
   71,706.83/98,945.82 = 39,869.60/x
3. Step 3: Cross multiply
   71,706.83x = 98,945.82 × 39,869.60
4. Step 4: Simplify right side
   71,706.83x = 3,944,929,770.34
5. Step 5: Solve for x
   x = 3,944,929,770.34/71,706.83
6. Step 6: Final answer
   x = 55,014.70