Finding the Fourth Proportional to 20,297.43, 28,010.88 and 12,744

Step by Step Solution

1. Step 1: Write the proportion equation
   20,297.43 : 28,010.88 = 12,744 : x
2. Step 2: Convert to fraction form
   20,297.43/28,010.88 = 12,744/x
3. Step 3: Cross multiply
   20,297.43x = 28,010.88 × 12,744
4. Step 4: Simplify right side
   20,297.43x = 356,970,654.72
5. Step 5: Solve for x
   x = 356,970,654.72/20,297.43
6. Step 6: Final answer
   x = 17,586.99