Finding the Fourth Proportional to 2,078.42, 2,868.80 and 1,228.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.42 : 2,868.80 = 1,228.46 : x
2. Step 2: Convert to fraction form
   2,078.42/2,868.80 = 1,228.46/x
3. Step 3: Cross multiply
   2,078.42x = 2,868.80 × 1,228.46
4. Step 4: Simplify right side
   2,078.42x = 3,524,185.56
5. Step 5: Solve for x
   x = 3,524,185.56/2,078.42
6. Step 6: Final answer
   x = 1,695.61