Finding the Fourth Proportional to 2,760.11, 4,141.18 and 1,280.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,760.11 : 4,141.18 = 1,280.05 : x
2. Step 2: Convert to fraction form
   2,760.11/4,141.18 = 1,280.05/x
3. Step 3: Cross multiply
   2,760.11x = 4,141.18 × 1,280.05
4. Step 4: Simplify right side
   2,760.11x = 5,300,908.71
5. Step 5: Solve for x
   x = 5,300,908.71/2,760.11
6. Step 6: Final answer
   x = 1,920.54