Finding the Fourth Proportional to 2,078.29, 2,867.72 and 1,238.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.29 : 2,867.72 = 1,238.69 : x
2. Step 2: Convert to fraction form
   2,078.29/2,867.72 = 1,238.69/x
3. Step 3: Cross multiply
   2,078.29x = 2,867.72 × 1,238.69
4. Step 4: Simplify right side
   2,078.29x = 3,552,217.06
5. Step 5: Solve for x
   x = 3,552,217.06/2,078.29
6. Step 6: Final answer
   x = 1,709.20