Finding the Fourth Proportional to 12,644.31, 17,445.66 and 7,607.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644.31 : 17,445.66 = 7,607.82 : x
2. Step 2: Convert to fraction form
   12,644.31/17,445.66 = 7,607.82/x
3. Step 3: Cross multiply
   12,644.31x = 17,445.66 × 7,607.82
4. Step 4: Simplify right side
   12,644.31x = 132,723,441.06
5. Step 5: Solve for x
   x = 132,723,441.06/12,644.31
6. Step 6: Final answer
   x = 10,496.69