Finding the Fourth Proportional to 12,508.43, 17,257.46 and 7,404.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,508.43 : 17,257.46 = 7,404.21 : x
2. Step 2: Convert to fraction form
   12,508.43/17,257.46 = 7,404.21/x
3. Step 3: Cross multiply
   12,508.43x = 17,257.46 × 7,404.21
4. Step 4: Simplify right side
   12,508.43x = 127,777,820.89
5. Step 5: Solve for x
   x = 127,777,820.89/12,508.43
6. Step 6: Final answer
   x = 10,215.34