Finding the Fourth Proportional to 2,340.78, 3,230.20 and 1,292.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.78 : 3,230.20 = 1,292.82 : x
2. Step 2: Convert to fraction form
   2,340.78/3,230.20 = 1,292.82/x
3. Step 3: Cross multiply
   2,340.78x = 3,230.20 × 1,292.82
4. Step 4: Simplify right side
   2,340.78x = 4,176,067.16
5. Step 5: Solve for x
   x = 4,176,067.16/2,340.78
6. Step 6: Final answer
   x = 1,784.05