Finding the Fourth Proportional to 2,339.72, 3,228.83 and 1,291.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.72 : 3,228.83 = 1,291.78 : x
2. Step 2: Convert to fraction form
   2,339.72/3,228.83 = 1,291.78/x
3. Step 3: Cross multiply
   2,339.72x = 3,228.83 × 1,291.78
4. Step 4: Simplify right side
   2,339.72x = 4,170,940.44
5. Step 5: Solve for x
   x = 4,170,940.44/2,339.72
6. Step 6: Final answer
   x = 1,782.67