Finding the Fourth Proportional to 2,571.16, 3,858.90 and 1,339

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.16 : 3,858.90 = 1,339 : x
2. Step 2: Convert to fraction form
   2,571.16/3,858.90 = 1,339/x
3. Step 3: Cross multiply
   2,571.16x = 3,858.90 × 1,339
4. Step 4: Simplify right side
   2,571.16x = 5,167,067.10
5. Step 5: Solve for x
   x = 5,167,067.10/2,571.16
6. Step 6: Final answer
   x = 2,009.62