Finding the Fourth Proportional to 22,819.75, 31,491.10 and 12,748.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,819.75 : 31,491.10 = 12,748.10 : x
2. Step 2: Convert to fraction form
   22,819.75/31,491.10 = 12,748.10/x
3. Step 3: Cross multiply
   22,819.75x = 31,491.10 × 12,748.10
4. Step 4: Simplify right side
   22,819.75x = 401,451,470.71
5. Step 5: Solve for x
   x = 401,451,470.71/22,819.75
6. Step 6: Final answer
   x = 17,592.29