Finding the Fourth Proportional to 71,715.38, 98,965.82 and 39,883.60

Step by Step Solution

1. Step 1: Write the proportion equation
   71,715.38 : 98,965.82 = 39,883.60 : x
2. Step 2: Convert to fraction form
   71,715.38/98,965.82 = 39,883.60/x
3. Step 3: Cross multiply
   71,715.38x = 98,965.82 × 39,883.60
4. Step 4: Simplify right side
   71,715.38x = 3,947,113,030.85
5. Step 5: Solve for x
   x = 3,947,113,030.85/71,715.38
6. Step 6: Final answer
   x = 55,038.58