Finding the Fourth Proportional to 1,229.83, 1,843.55 and 680.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.83 : 1,843.55 = 680.86 : x
2. Step 2: Convert to fraction form
   1,229.83/1,843.55 = 680.86/x
3. Step 3: Cross multiply
   1,229.83x = 1,843.55 × 680.86
4. Step 4: Simplify right side
   1,229.83x = 1,255,186.83
5. Step 5: Solve for x
   x = 1,255,186.83/1,229.83
6. Step 6: Final answer
   x = 1,020.62