Finding the Fourth Proportional to 12,637.92, 17,433.72 and 9,648.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,637.92 : 17,433.72 = 9,648.57 : x
2. Step 2: Convert to fraction form
   12,637.92/17,433.72 = 9,648.57/x
3. Step 3: Cross multiply
   12,637.92x = 17,433.72 × 9,648.57
4. Step 4: Simplify right side
   12,637.92x = 168,210,467.78
5. Step 5: Solve for x
   x = 168,210,467.78/12,637.92
6. Step 6: Final answer
   x = 13,309.98