Finding the Fourth Proportional to 1,404.86, 1,939.62 and 1,257.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.86 : 1,939.62 = 1,257.24 : x
2. Step 2: Convert to fraction form
   1,404.86/1,939.62 = 1,257.24/x
3. Step 3: Cross multiply
   1,404.86x = 1,939.62 × 1,257.24
4. Step 4: Simplify right side
   1,404.86x = 2,438,567.85
5. Step 5: Solve for x
   x = 2,438,567.85/1,404.86
6. Step 6: Final answer
   x = 1,735.81