Finding the Fourth Proportional to 22,891.23, 31,591.35 and 12,819.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.23 : 31,591.35 = 12,819.29 : x
2. Step 2: Convert to fraction form
   22,891.23/31,591.35 = 12,819.29/x
3. Step 3: Cross multiply
   22,891.23x = 31,591.35 × 12,819.29
4. Step 4: Simplify right side
   22,891.23x = 404,978,519.18
5. Step 5: Solve for x
   x = 404,978,519.18/22,891.23
6. Step 6: Final answer
   x = 17,691.43