Finding the Fourth Proportional to 1,377.90, 2,066.73 and 404.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.90 : 2,066.73 = 404.07 : x
2. Step 2: Convert to fraction form
   1,377.90/2,066.73 = 404.07/x
3. Step 3: Cross multiply
   1,377.90x = 2,066.73 × 404.07
4. Step 4: Simplify right side
   1,377.90x = 835,103.59
5. Step 5: Solve for x
   x = 835,103.59/1,377.90
6. Step 6: Final answer
   x = 606.07