Finding the Fourth Proportional to 1,280.93, 1,760.01 and 1,018.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.93 : 1,760.01 = 1,018.49 : x
2. Step 2: Convert to fraction form
   1,280.93/1,760.01 = 1,018.49/x
3. Step 3: Cross multiply
   1,280.93x = 1,760.01 × 1,018.49
4. Step 4: Simplify right side
   1,280.93x = 1,792,543.78
5. Step 5: Solve for x
   x = 1,792,543.78/1,280.93
6. Step 6: Final answer
   x = 1,399.41