Finding the Fourth Proportional to 2,222.71, 3,067.45 and 1,278.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.71 : 3,067.45 = 1,278.52 : x
2. Step 2: Convert to fraction form
   2,222.71/3,067.45 = 1,278.52/x
3. Step 3: Cross multiply
   2,222.71x = 3,067.45 × 1,278.52
4. Step 4: Simplify right side
   2,222.71x = 3,921,785.31
5. Step 5: Solve for x
   x = 3,921,785.31/2,222.71
6. Step 6: Final answer
   x = 1,764.42