Finding the Fourth Proportional to 1,174.28, 1,761.42 and 404.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,174.28 : 1,761.42 = 404.78 : x
2. Step 2: Convert to fraction form
   1,174.28/1,761.42 = 404.78/x
3. Step 3: Cross multiply
   1,174.28x = 1,761.42 × 404.78
4. Step 4: Simplify right side
   1,174.28x = 712,987.59
5. Step 5: Solve for x
   x = 712,987.59/1,174.28
6. Step 6: Final answer
   x = 607.17