Finding the Fourth Proportional to 2,275.73, 3,140.56 and 1,280.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.73 : 3,140.56 = 1,280.94 : x
2. Step 2: Convert to fraction form
   2,275.73/3,140.56 = 1,280.94/x
3. Step 3: Cross multiply
   2,275.73x = 3,140.56 × 1,280.94
4. Step 4: Simplify right side
   2,275.73x = 4,022,868.93
5. Step 5: Solve for x
   x = 4,022,868.93/2,275.73
6. Step 6: Final answer
   x = 1,767.73