Finding the Fourth Proportional to 12,831.50, 17,707.75 and 8,051.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,831.50 : 17,707.75 = 8,051.65 : x
2. Step 2: Convert to fraction form
   12,831.50/17,707.75 = 8,051.65/x
3. Step 3: Cross multiply
   12,831.50x = 17,707.75 × 8,051.65
4. Step 4: Simplify right side
   12,831.50x = 142,576,540.89
5. Step 5: Solve for x
   x = 142,576,540.89/12,831.50
6. Step 6: Final answer
   x = 11,111.45