Finding the Fourth Proportional to 12,831.50, 17,705.30 and 8,575.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831.50 : 17,705.30 = 8,575.72 : x
2. Step 2: Convert to fraction form
   12,831.50/17,705.30 = 8,575.72/x
3. Step 3: Cross multiply
   12,831.50x = 17,705.30 × 8,575.72
4. Step 4: Simplify right side
   12,831.50x = 151,835,695.32
5. Step 5: Solve for x
   x = 151,835,695.32/12,831.50
6. Step 6: Final answer
   x = 11,833.04