Finding the Fourth Proportional to 2,066.70, 3,100.25 and 680.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.70 : 3,100.25 = 680.05 : x
2. Step 2: Convert to fraction form
   2,066.70/3,100.25 = 680.05/x
3. Step 3: Cross multiply
   2,066.70x = 3,100.25 × 680.05
4. Step 4: Simplify right side
   2,066.70x = 2,108,325.01
5. Step 5: Solve for x
   x = 2,108,325.01/2,066.70
6. Step 6: Final answer
   x = 1,020.14