Finding the Fourth Proportional to 12,856.59, 17,744.00 and 8,141.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,856.59 : 17,744.00 = 8,141.31 : x
2. Step 2: Convert to fraction form
   12,856.59/17,744.00 = 8,141.31/x
3. Step 3: Cross multiply
   12,856.59x = 17,744.00 × 8,141.31
4. Step 4: Simplify right side
   12,856.59x = 144,459,363.93
5. Step 5: Solve for x
   x = 144,459,363.93/12,856.59
6. Step 6: Final answer
   x = 11,236.21