Finding the Fourth Proportional to 22,929.12, 31,643.88 and 12,857.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,929.12 : 31,643.88 = 12,857.52 : x
2. Step 2: Convert to fraction form
   22,929.12/31,643.88 = 12,857.52/x
3. Step 3: Cross multiply
   22,929.12x = 31,643.88 × 12,857.52
4. Step 4: Simplify right side
   22,929.12x = 406,861,819.98
5. Step 5: Solve for x
   x = 406,861,819.98/22,929.12
6. Step 6: Final answer
   x = 17,744.33