Finding the Fourth Proportional to 12,685.00, 17,509.94 and 7,649.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.00 : 17,509.94 = 7,649.43 : x
2. Step 2: Convert to fraction form
   12,685.00/17,509.94 = 7,649.43/x
3. Step 3: Cross multiply
   12,685.00x = 17,509.94 × 7,649.43
4. Step 4: Simplify right side
   12,685.00x = 133,940,934.54
5. Step 5: Solve for x
   x = 133,940,934.54/12,685.00
6. Step 6: Final answer
   x = 10,559.01