Finding the Fourth Proportional to 2,078.60, 3,118.05 and 1,255.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.60 : 3,118.05 = 1,255.10 : x
2. Step 2: Convert to fraction form
   2,078.60/3,118.05 = 1,255.10/x
3. Step 3: Cross multiply
   2,078.60x = 3,118.05 × 1,255.10
4. Step 4: Simplify right side
   2,078.60x = 3,913,464.56
5. Step 5: Solve for x
   x = 3,913,464.56/2,078.60
6. Step 6: Final answer
   x = 1,882.74