Finding the Fourth Proportional to 71,510.93, 98,684.77 and 39,679.76

Step by Step Solution

1. Step 1: Write the proportion equation
   71,510.93 : 98,684.77 = 39,679.76 : x
2. Step 2: Convert to fraction form
   71,510.93/98,684.77 = 39,679.76/x
3. Step 3: Cross multiply
   71,510.93x = 98,684.77 × 39,679.76
4. Step 4: Simplify right side
   71,510.93x = 3,915,787,297.43
5. Step 5: Solve for x
   x = 3,915,787,297.43/71,510.93
6. Step 6: Final answer
   x = 54,757.89