Finding the Fourth Proportional to 2,719.41, 4,078.86 and 1,258.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,719.41 : 4,078.86 = 1,258.57 : x
2. Step 2: Convert to fraction form
   2,719.41/4,078.86 = 1,258.57/x
3. Step 3: Cross multiply
   2,719.41x = 4,078.86 × 1,258.57
4. Step 4: Simplify right side
   2,719.41x = 5,133,530.83
5. Step 5: Solve for x
   x = 5,133,530.83/2,719.41
6. Step 6: Final answer
   x = 1,887.74