Finding the Fourth Proportional to 71,510.67, 98,684.72 and 39,684.69

Step by Step Solution

1. Step 1: Write the proportion equation
   71,510.67 : 98,684.72 = 39,684.69 : x
2. Step 2: Convert to fraction form
   71,510.67/98,684.72 = 39,684.69/x
3. Step 3: Cross multiply
   71,510.67x = 98,684.72 × 39,684.69
4. Step 4: Simplify right side
   71,510.67x = 3,916,272,520.94
5. Step 5: Solve for x
   x = 3,916,272,520.94/71,510.67
6. Step 6: Final answer
   x = 54,764.87