Finding the Fourth Proportional to 2,412.28, 3,618.01 and 680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,412.28 : 3,618.01 = 680.50 : x
2. Step 2: Convert to fraction form
   2,412.28/3,618.01 = 680.50/x
3. Step 3: Cross multiply
   2,412.28x = 3,618.01 × 680.50
4. Step 4: Simplify right side
   2,412.28x = 2,462,055.81
5. Step 5: Solve for x
   x = 2,462,055.81/2,412.28
6. Step 6: Final answer
   x = 1,020.63