Finding the Fourth Proportional to 2,078.39, 2,868.77 and 1,228.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.39 : 2,868.77 = 1,228.43 : x
2. Step 2: Convert to fraction form
   2,078.39/2,868.77 = 1,228.43/x
3. Step 3: Cross multiply
   2,078.39x = 2,868.77 × 1,228.43
4. Step 4: Simplify right side
   2,078.39x = 3,524,064.95
5. Step 5: Solve for x
   x = 3,524,064.95/2,078.39
6. Step 6: Final answer
   x = 1,695.58