Finding the Fourth Proportional to 31,443.78, 43,387.63 and 17,831.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,443.78 : 43,387.63 = 17,831.06 : x
2. Step 2: Convert to fraction form
   31,443.78/43,387.63 = 17,831.06/x
3. Step 3: Cross multiply
   31,443.78x = 43,387.63 × 17,831.06
4. Step 4: Simplify right side
   31,443.78x = 773,647,433.79
5. Step 5: Solve for x
   x = 773,647,433.79/31,443.78
6. Step 6: Final answer
   x = 24,604.15