Finding the Fourth Proportional to 2,066.87, 3,100.79 and 680.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.87 : 3,100.79 = 680.32 : x
2. Step 2: Convert to fraction form
   2,066.87/3,100.79 = 680.32/x
3. Step 3: Cross multiply
   2,066.87x = 3,100.79 × 680.32
4. Step 4: Simplify right side
   2,066.87x = 2,109,529.45
5. Step 5: Solve for x
   x = 2,109,529.45/2,066.87
6. Step 6: Final answer
   x = 1,020.64