Finding the Fourth Proportional to 404.69, 605.82 and 274.82

Step by Step Solution

1. Step 1: Write the proportion equation
   404.69 : 605.82 = 274.82 : x
2. Step 2: Convert to fraction form
   404.69/605.82 = 274.82/x
3. Step 3: Cross multiply
   404.69x = 605.82 × 274.82
4. Step 4: Simplify right side
   404.69x = 166,491.45
5. Step 5: Solve for x
   x = 166,491.45/404.69
6. Step 6: Final answer
   x = 411.40