Finding the Fourth Proportional to 269.88, 404.82 and 105.39

Step by Step Solution

1. Step 1: Write the proportion equation
   269.88 : 404.82 = 105.39 : x
2. Step 2: Convert to fraction form
   269.88/404.82 = 105.39/x
3. Step 3: Cross multiply
   269.88x = 404.82 × 105.39
4. Step 4: Simplify right side
   269.88x = 42,663.98
5. Step 5: Solve for x
   x = 42,663.98/269.88
6. Step 6: Final answer
   x = 158.09