Finding the Fourth Proportional to 11,496.89, 17,231.42 and 8,159.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,496.89 : 17,231.42 = 8,159.90 : x
2. Step 2: Convert to fraction form
   11,496.89/17,231.42 = 8,159.90/x
3. Step 3: Cross multiply
   11,496.89x = 17,231.42 × 8,159.90
4. Step 4: Simplify right side
   11,496.89x = 140,606,598.30
5. Step 5: Solve for x
   x = 140,606,598.30/11,496.89
6. Step 6: Final answer
   x = 12,229.97