Finding the Fourth Proportional to 404.72, 558.72 and 249.56

Step by Step Solution

1. Step 1: Write the proportion equation
   404.72 : 558.72 = 249.56 : x
2. Step 2: Convert to fraction form
   404.72/558.72 = 249.56/x
3. Step 3: Cross multiply
   404.72x = 558.72 × 249.56
4. Step 4: Simplify right side
   404.72x = 139,434.16
5. Step 5: Solve for x
   x = 139,434.16/404.72
6. Step 6: Final answer
   x = 344.52