Finding the Fourth Proportional to 22,320.43, 30,800.23 and 12,758.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,320.43 : 30,800.23 = 12,758.42 : x
2. Step 2: Convert to fraction form
   22,320.43/30,800.23 = 12,758.42/x
3. Step 3: Cross multiply
   22,320.43x = 30,800.23 × 12,758.42
4. Step 4: Simplify right side
   22,320.43x = 392,962,270.44
5. Step 5: Solve for x
   x = 392,962,270.44/22,320.43
6. Step 6: Final answer
   x = 17,605.50