Finding the Fourth Proportional to 12,851.71, 17,739.83 and 8,831.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,851.71 : 17,739.83 = 8,831.85 : x
2. Step 2: Convert to fraction form
   12,851.71/17,739.83 = 8,831.85/x
3. Step 3: Cross multiply
   12,851.71x = 17,739.83 × 8,831.85
4. Step 4: Simplify right side
   12,851.71x = 156,675,429.08
5. Step 5: Solve for x
   x = 156,675,429.08/12,851.71
6. Step 6: Final answer
   x = 12,191.02