Finding the Fourth Proportional to 13,118.96, 18,105.42 and 8,086.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,118.96 : 18,105.42 = 8,086.56 : x
2. Step 2: Convert to fraction form
   13,118.96/18,105.42 = 8,086.56/x
3. Step 3: Cross multiply
   13,118.96x = 18,105.42 × 8,086.56
4. Step 4: Simplify right side
   13,118.96x = 146,410,565.16
5. Step 5: Solve for x
   x = 146,410,565.16/13,118.96
6. Step 6: Final answer
   x = 11,160.23