Finding the Fourth Proportional to 2,743.95, 4,111.20 and 1,280.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,743.95 : 4,111.20 = 1,280.10 : x
2. Step 2: Convert to fraction form
   2,743.95/4,111.20 = 1,280.10/x
3. Step 3: Cross multiply
   2,743.95x = 4,111.20 × 1,280.10
4. Step 4: Simplify right side
   2,743.95x = 5,262,747.12
5. Step 5: Solve for x
   x = 5,262,747.12/2,743.95
6. Step 6: Final answer
   x = 1,917.95