Finding the Fourth Proportional to 22,900.23, 31,603.61 and 12,831.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,900.23 : 31,603.61 = 12,831.91 : x
2. Step 2: Convert to fraction form
   22,900.23/31,603.61 = 12,831.91/x
3. Step 3: Cross multiply
   22,900.23x = 31,603.61 × 12,831.91
4. Step 4: Simplify right side
   22,900.23x = 405,534,806.52
5. Step 5: Solve for x
   x = 405,534,806.52/22,900.23
6. Step 6: Final answer
   x = 17,708.77