Finding the Fourth Proportional to 2,222.59, 3,067.76 and 1,278.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.59 : 3,067.76 = 1,278.48 : x
2. Step 2: Convert to fraction form
   2,222.59/3,067.76 = 1,278.48/x
3. Step 3: Cross multiply
   2,222.59x = 3,067.76 × 1,278.48
4. Step 4: Simplify right side
   2,222.59x = 3,922,069.80
5. Step 5: Solve for x
   x = 3,922,069.80/2,222.59
6. Step 6: Final answer
   x = 1,764.64