Finding the Fourth Proportional to 12,425.57, 17,143.89 and 8,644.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,425.57 : 17,143.89 = 8,644.49 : x
2. Step 2: Convert to fraction form
   12,425.57/17,143.89 = 8,644.49/x
3. Step 3: Cross multiply
   12,425.57x = 17,143.89 × 8,644.49
4. Step 4: Simplify right side
   12,425.57x = 148,200,185.67
5. Step 5: Solve for x
   x = 148,200,185.67/12,425.57
6. Step 6: Final answer
   x = 11,927.03