Finding the Fourth Proportional to 22,915.37, 31,622.92 and 12,843.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,915.37 : 31,622.92 = 12,843.80 : x
2. Step 2: Convert to fraction form
   22,915.37/31,622.92 = 12,843.80/x
3. Step 3: Cross multiply
   22,915.37x = 31,622.92 × 12,843.80
4. Step 4: Simplify right side
   22,915.37x = 406,158,301.78
5. Step 5: Solve for x
   x = 406,158,301.78/22,915.37
6. Step 6: Final answer
   x = 17,724.28