Finding the Fourth Proportional to 269.33, 404.03 and 86.76

Step by Step Solution

1. Step 1: Write the proportion equation
   269.33 : 404.03 = 86.76 : x
2. Step 2: Convert to fraction form
   269.33/404.03 = 86.76/x
3. Step 3: Cross multiply
   269.33x = 404.03 × 86.76
4. Step 4: Simplify right side
   269.33x = 35,053.86
5. Step 5: Solve for x
   x = 35,053.86/269.33
6. Step 6: Final answer
   x = 130.15