Finding the Fourth Proportional to 9,831.30, 14,714.55 and 8,664.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,831.30 : 14,714.55 = 8,664.90 : x
2. Step 2: Convert to fraction form
   9,831.30/14,714.55 = 8,664.90/x
3. Step 3: Cross multiply
   9,831.30x = 14,714.55 × 8,664.90
4. Step 4: Simplify right side
   9,831.30x = 127,500,104.30
5. Step 5: Solve for x
   x = 127,500,104.30/9,831.30
6. Step 6: Final answer
   x = 12,968.79