Finding the Fourth Proportional to 2,222.24, 3,067.12 and 1,290.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,222.24 : 3,067.12 = 1,290.88 : x
2. Step 2: Convert to fraction form
   2,222.24/3,067.12 = 1,290.88/x
3. Step 3: Cross multiply
   2,222.24x = 3,067.12 × 1,290.88
4. Step 4: Simplify right side
   2,222.24x = 3,959,283.87
5. Step 5: Solve for x
   x = 3,959,283.87/2,222.24
6. Step 6: Final answer
   x = 1,781.66