Finding the Fourth Proportional to 12,644.99, 17,451.15 and 7,339.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644.99 : 17,451.15 = 7,339.46 : x
2. Step 2: Convert to fraction form
   12,644.99/17,451.15 = 7,339.46/x
3. Step 3: Cross multiply
   12,644.99x = 17,451.15 × 7,339.46
4. Step 4: Simplify right side
   12,644.99x = 128,082,017.38
5. Step 5: Solve for x
   x = 128,082,017.38/12,644.99
6. Step 6: Final answer
   x = 10,129.07