Finding the Fourth Proportional to 404.69, 603.50 and 387.27

Step by Step Solution

1. Step 1: Write the proportion equation
   404.69 : 603.50 = 387.27 : x
2. Step 2: Convert to fraction form
   404.69/603.50 = 387.27/x
3. Step 3: Cross multiply
   404.69x = 603.50 × 387.27
4. Step 4: Simplify right side
   404.69x = 233,715.51
5. Step 5: Solve for x
   x = 233,715.51/404.69
6. Step 6: Final answer
   x = 577.52