Finding the Fourth Proportional to 2,078.40, 2,868.56 and 1,239.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.40 : 2,868.56 = 1,239.16 : x
2. Step 2: Convert to fraction form
   2,078.40/2,868.56 = 1,239.16/x
3. Step 3: Cross multiply
   2,078.40x = 2,868.56 × 1,239.16
4. Step 4: Simplify right side
   2,078.40x = 3,554,584.27
5. Step 5: Solve for x
   x = 3,554,584.27/2,078.40
6. Step 6: Final answer
   x = 1,710.25