Finding the Fourth Proportional to 2,222.84, 3,067.72 and 1,228.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.84 : 3,067.72 = 1,228.31 : x
2. Step 2: Convert to fraction form
   2,222.84/3,067.72 = 1,228.31/x
3. Step 3: Cross multiply
   2,222.84x = 3,067.72 × 1,228.31
4. Step 4: Simplify right side
   2,222.84x = 3,768,128.41
5. Step 5: Solve for x
   x = 3,768,128.41/2,222.84
6. Step 6: Final answer
   x = 1,695.18