Finding the Fourth Proportional to 71,498.56, 98,679.82 and 39,677.70

Step by Step Solution

1. Step 1: Write the proportion equation
   71,498.56 : 98,679.82 = 39,677.70 : x
2. Step 2: Convert to fraction form
   71,498.56/98,679.82 = 39,677.70/x
3. Step 3: Cross multiply
   71,498.56x = 98,679.82 × 39,677.70
4. Step 4: Simplify right side
   71,498.56x = 3,915,388,294.01
5. Step 5: Solve for x
   x = 3,915,388,294.01/71,498.56
6. Step 6: Final answer
   x = 54,761.78