Finding the Fourth Proportional to 2,398.78, 3,590.34 and 1,300.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.78 : 3,590.34 = 1,300.42 : x
2. Step 2: Convert to fraction form
   2,398.78/3,590.34 = 1,300.42/x
3. Step 3: Cross multiply
   2,398.78x = 3,590.34 × 1,300.42
4. Step 4: Simplify right side
   2,398.78x = 4,668,949.94
5. Step 5: Solve for x
   x = 4,668,949.94/2,398.78
6. Step 6: Final answer
   x = 1,946.39