Finding the Fourth Proportional to 13,371.59, 18,456.78 and 8,656.17

Step by Step Solution

1. Step 1: Write the proportion equation
   13,371.59 : 18,456.78 = 8,656.17 : x
2. Step 2: Convert to fraction form
   13,371.59/18,456.78 = 8,656.17/x
3. Step 3: Cross multiply
   13,371.59x = 18,456.78 × 8,656.17
4. Step 4: Simplify right side
   13,371.59x = 159,765,025.33
5. Step 5: Solve for x
   x = 159,765,025.33/13,371.59
6. Step 6: Final answer
   x = 11,948.10