Finding the Fourth Proportional to 22,901.98, 31,606.32 and 12,831.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,901.98 : 31,606.32 = 12,831.28 : x
2. Step 2: Convert to fraction form
   22,901.98/31,606.32 = 12,831.28/x
3. Step 3: Cross multiply
   22,901.98x = 31,606.32 × 12,831.28
4. Step 4: Simplify right side
   22,901.98x = 405,549,541.69
5. Step 5: Solve for x
   x = 405,549,541.69/22,901.98
6. Step 6: Final answer
   x = 17,708.06