Finding the Fourth Proportional to 2,761.40, 4,142.56 and 1,282.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.40 : 4,142.56 = 1,282.10 : x
2. Step 2: Convert to fraction form
   2,761.40/4,142.56 = 1,282.10/x
3. Step 3: Cross multiply
   2,761.40x = 4,142.56 × 1,282.10
4. Step 4: Simplify right side
   2,761.40x = 5,311,176.18
5. Step 5: Solve for x
   x = 5,311,176.18/2,761.40
6. Step 6: Final answer
   x = 1,923.36