Finding the Fourth Proportional to 2,718.72, 4,078.62 and 1,158.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.72 : 4,078.62 = 1,158.71 : x
2. Step 2: Convert to fraction form
   2,718.72/4,078.62 = 1,158.71/x
3. Step 3: Cross multiply
   2,718.72x = 4,078.62 × 1,158.71
4. Step 4: Simplify right side
   2,718.72x = 4,725,917.39
5. Step 5: Solve for x
   x = 4,725,917.39/2,718.72
6. Step 6: Final answer
   x = 1,738.29