Finding the Fourth Proportional to 2,222.56, 3,067.37 and 1,278.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.56 : 3,067.37 = 1,278.64 : x
2. Step 2: Convert to fraction form
   2,222.56/3,067.37 = 1,278.64/x
3. Step 3: Cross multiply
   2,222.56x = 3,067.37 × 1,278.64
4. Step 4: Simplify right side
   2,222.56x = 3,922,061.98
5. Step 5: Solve for x
   x = 3,922,061.98/2,222.56
6. Step 6: Final answer
   x = 1,764.66