Finding the Fourth Proportional to 31,255.71, 43,131.78 and 17,831.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,255.71 : 43,131.78 = 17,831.31 : x
2. Step 2: Convert to fraction form
   31,255.71/43,131.78 = 17,831.31/x
3. Step 3: Cross multiply
   31,255.71x = 43,131.78 × 17,831.31
4. Step 4: Simplify right side
   31,255.71x = 769,096,140.03
5. Step 5: Solve for x
   x = 769,096,140.03/31,255.71
6. Step 6: Final answer
   x = 24,606.58