Finding the Fourth Proportional to 2,078.82, 2,867.49 and 1,238.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.82 : 2,867.49 = 1,238.99 : x
2. Step 2: Convert to fraction form
   2,078.82/2,867.49 = 1,238.99/x
3. Step 3: Cross multiply
   2,078.82x = 2,867.49 × 1,238.99
4. Step 4: Simplify right side
   2,078.82x = 3,552,777.10
5. Step 5: Solve for x
   x = 3,552,777.10/2,078.82
6. Step 6: Final answer
   x = 1,709.04