Finding the Fourth Proportional to 774.05, 1,069.89 and 680.09

Step by Step Solution

1. Step 1: Write the proportion equation
   774.05 : 1,069.89 = 680.09 : x
2. Step 2: Convert to fraction form
   774.05/1,069.89 = 680.09/x
3. Step 3: Cross multiply
   774.05x = 1,069.89 × 680.09
4. Step 4: Simplify right side
   774.05x = 727,621.49
5. Step 5: Solve for x
   x = 727,621.49/774.05
6. Step 6: Final answer
   x = 940.02