Finding the Fourth Proportional to 12,831.68, 17,709.82 and 7,454.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831.68 : 17,709.82 = 7,454.28 : x
2. Step 2: Convert to fraction form
   12,831.68/17,709.82 = 7,454.28/x
3. Step 3: Cross multiply
   12,831.68x = 17,709.82 × 7,454.28
4. Step 4: Simplify right side
   12,831.68x = 132,013,957.03
5. Step 5: Solve for x
   x = 132,013,957.03/12,831.68
6. Step 6: Final answer
   x = 10,288.13