Finding the Fourth Proportional to 2,742.15, 4,113.83 and 1,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,742.15 : 4,113.83 = 1,280.50 : x
2. Step 2: Convert to fraction form
   2,742.15/4,113.83 = 1,280.50/x
3. Step 3: Cross multiply
   2,742.15x = 4,113.83 × 1,280.50
4. Step 4: Simplify right side
   2,742.15x = 5,267,759.32
5. Step 5: Solve for x
   x = 5,267,759.32/2,742.15
6. Step 6: Final answer
   x = 1,921.03