Finding the Fourth Proportional to 12,831.69, 17,702.85 and 8,049.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831.69 : 17,702.85 = 8,049.60 : x
2. Step 2: Convert to fraction form
   12,831.69/17,702.85 = 8,049.60/x
3. Step 3: Cross multiply
   12,831.69x = 17,702.85 × 8,049.60
4. Step 4: Simplify right side
   12,831.69x = 142,500,941.34
5. Step 5: Solve for x
   x = 142,500,941.34/12,831.69
6. Step 6: Final answer
   x = 11,105.39