Finding the Fourth Proportional to 9,708.72, 14,497.28 and 7,711.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,708.72 : 14,497.28 = 7,711.94 : x
2. Step 2: Convert to fraction form
   9,708.72/14,497.28 = 7,711.94/x
3. Step 3: Cross multiply
   9,708.72x = 14,497.28 × 7,711.94
4. Step 4: Simplify right side
   9,708.72x = 111,802,042.48
5. Step 5: Solve for x
   x = 111,802,042.48/9,708.72
6. Step 6: Final answer
   x = 11,515.63