Finding the Fourth Proportional to 22,910.62, 31,616.38 and 12,839.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,910.62 : 31,616.38 = 12,839.02 : x
2. Step 2: Convert to fraction form
   22,910.62/31,616.38 = 12,839.02/x
3. Step 3: Cross multiply
   22,910.62x = 31,616.38 × 12,839.02
4. Step 4: Simplify right side
   22,910.62x = 405,923,335.15
5. Step 5: Solve for x
   x = 405,923,335.15/22,910.62
6. Step 6: Final answer
   x = 17,717.69