Finding the Fourth Proportional to 71,709.57, 98,962.56 and 39,879

Step by Step Solution

1. Step 1: Write the proportion equation
   71,709.57 : 98,962.56 = 39,879 : x
2. Step 2: Convert to fraction form
   71,709.57/98,962.56 = 39,879/x
3. Step 3: Cross multiply
   71,709.57x = 98,962.56 × 39,879
4. Step 4: Simplify right side
   71,709.57x = 3,946,527,930.24
5. Step 5: Solve for x
   x = 3,946,527,930.24/71,709.57
6. Step 6: Final answer
   x = 55,034.88