Finding the Fourth Proportional to 12,867.26, 17,753.75 and 7,831.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,867.26 : 17,753.75 = 7,831.42 : x
2. Step 2: Convert to fraction form
   12,867.26/17,753.75 = 7,831.42/x
3. Step 3: Cross multiply
   12,867.26x = 17,753.75 × 7,831.42
4. Step 4: Simplify right side
   12,867.26x = 139,037,018.65
5. Step 5: Solve for x
   x = 139,037,018.65/12,867.26
6. Step 6: Final answer
   x = 10,805.49