Finding the Fourth Proportional to 12,641.96, 17,426.04 and 8,656.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,641.96 : 17,426.04 = 8,656.18 : x
2. Step 2: Convert to fraction form
   12,641.96/17,426.04 = 8,656.18/x
3. Step 3: Cross multiply
   12,641.96x = 17,426.04 × 8,656.18
4. Step 4: Simplify right side
   12,641.96x = 150,842,938.93
5. Step 5: Solve for x
   x = 150,842,938.93/12,641.96
6. Step 6: Final answer
   x = 11,931.93