Finding the Fourth Proportional to 404.69, 558.50 and 294.12

Step by Step Solution

1. Step 1: Write the proportion equation
   404.69 : 558.50 = 294.12 : x
2. Step 2: Convert to fraction form
   404.69/558.50 = 294.12/x
3. Step 3: Cross multiply
   404.69x = 558.50 × 294.12
4. Step 4: Simplify right side
   404.69x = 164,264.55
5. Step 5: Solve for x
   x = 164,264.55/404.69
6. Step 6: Final answer
   x = 405.91