Finding the Fourth Proportional to 2,557.71, 3,832.83 and 1,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.71 : 3,832.83 = 1,386.72 : x
2. Step 2: Convert to fraction form
   2,557.71/3,832.83 = 1,386.72/x
3. Step 3: Cross multiply
   2,557.71x = 3,832.83 × 1,386.72
4. Step 4: Simplify right side
   2,557.71x = 5,315,062.02
5. Step 5: Solve for x
   x = 5,315,062.02/2,557.71
6. Step 6: Final answer
   x = 2,078.05