Finding the Fourth Proportional to 22,819.50, 31,491.60 and 12,748.38

Step by Step Solution

1. Step 1: Write the proportion equation
   22,819.50 : 31,491.60 = 12,748.38 : x
2. Step 2: Convert to fraction form
   22,819.50/31,491.60 = 12,748.38/x
3. Step 3: Cross multiply
   22,819.50x = 31,491.60 × 12,748.38
4. Step 4: Simplify right side
   22,819.50x = 401,466,883.61
5. Step 5: Solve for x
   x = 401,466,883.61/22,819.50
6. Step 6: Final answer
   x = 17,593.15