Finding the Fourth Proportional to 2,078.33, 2,867.81 and 1,238.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.33 : 2,867.81 = 1,238.96 : x
2. Step 2: Convert to fraction form
   2,078.33/2,867.81 = 1,238.96/x
3. Step 3: Cross multiply
   2,078.33x = 2,867.81 × 1,238.96
4. Step 4: Simplify right side
   2,078.33x = 3,553,102.85
5. Step 5: Solve for x
   x = 3,553,102.85/2,078.33
6. Step 6: Final answer
   x = 1,709.60