Finding the Fourth Proportional to 8,831.59, 13,250.61 and 8,309.95

Step by Step Solution

1. Step 1: Write the proportion equation
   8,831.59 : 13,250.61 = 8,309.95 : x
2. Step 2: Convert to fraction form
   8,831.59/13,250.61 = 8,309.95/x
3. Step 3: Cross multiply
   8,831.59x = 13,250.61 × 8,309.95
4. Step 4: Simplify right side
   8,831.59x = 110,111,906.57
5. Step 5: Solve for x
   x = 110,111,906.57/8,831.59
6. Step 6: Final answer
   x = 12,467.96