Finding the Fourth Proportional to 2,222.90, 3,067.61 and 1,228.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.90 : 3,067.61 = 1,228.18 : x
2. Step 2: Convert to fraction form
   2,222.90/3,067.61 = 1,228.18/x
3. Step 3: Cross multiply
   2,222.90x = 3,067.61 × 1,228.18
4. Step 4: Simplify right side
   2,222.90x = 3,767,577.25
5. Step 5: Solve for x
   x = 3,767,577.25/2,222.90
6. Step 6: Final answer
   x = 1,694.89