Finding the Fourth Proportional to 2,747.36, 4,123.78 and 1,287.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,747.36 : 4,123.78 = 1,287.56 : x
2. Step 2: Convert to fraction form
   2,747.36/4,123.78 = 1,287.56/x
3. Step 3: Cross multiply
   2,747.36x = 4,123.78 × 1,287.56
4. Step 4: Simplify right side
   2,747.36x = 5,309,614.18
5. Step 5: Solve for x
   x = 5,309,614.18/2,747.36
6. Step 6: Final answer
   x = 1,932.62