Finding the Fourth Proportional to 1,774.78, 2,662.34 and 680.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,774.78 : 2,662.34 = 680.06 : x
2. Step 2: Convert to fraction form
   1,774.78/2,662.34 = 680.06/x
3. Step 3: Cross multiply
   1,774.78x = 2,662.34 × 680.06
4. Step 4: Simplify right side
   1,774.78x = 1,810,550.94
5. Step 5: Solve for x
   x = 1,810,550.94/1,774.78
6. Step 6: Final answer
   x = 1,020.16