Finding the Fourth Proportional to 2,740.56, 4,112.16 and 1,278.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.56 : 4,112.16 = 1,278.96 : x
2. Step 2: Convert to fraction form
   2,740.56/4,112.16 = 1,278.96/x
3. Step 3: Cross multiply
   2,740.56x = 4,112.16 × 1,278.96
4. Step 4: Simplify right side
   2,740.56x = 5,259,288.15
5. Step 5: Solve for x
   x = 5,259,288.15/2,740.56
6. Step 6: Final answer
   x = 1,919.06