Finding the Fourth Proportional to 2,222.88, 3,067.56 and 1,228.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.88 : 3,067.56 = 1,228.20 : x
2. Step 2: Convert to fraction form
   2,222.88/3,067.56 = 1,228.20/x
3. Step 3: Cross multiply
   2,222.88x = 3,067.56 × 1,228.20
4. Step 4: Simplify right side
   2,222.88x = 3,767,577.19
5. Step 5: Solve for x
   x = 3,767,577.19/2,222.88
6. Step 6: Final answer
   x = 1,694.91