Finding the Fourth Proportional to 2,078.29, 2,867.43 and 1,238.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.29 : 2,867.43 = 1,238.59 : x
2. Step 2: Convert to fraction form
   2,078.29/2,867.43 = 1,238.59/x
3. Step 3: Cross multiply
   2,078.29x = 2,867.43 × 1,238.59
4. Step 4: Simplify right side
   2,078.29x = 3,551,570.12
5. Step 5: Solve for x
   x = 3,551,570.12/2,078.29
6. Step 6: Final answer
   x = 1,708.89