Finding the Fourth Proportional to 404.10, 557.71 and 273.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404.10 : 557.71 = 273.10 : x
2. Step 2: Convert to fraction form
   404.10/557.71 = 273.10/x
3. Step 3: Cross multiply
   404.10x = 557.71 × 273.10
4. Step 4: Simplify right side
   404.10x = 152,310.60
5. Step 5: Solve for x
   x = 152,310.60/404.10
6. Step 6: Final answer
   x = 376.91