Finding the Fourth Proportional to 2,412.29, 3,618.56 and 681.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,412.29 : 3,618.56 = 681.05 : x
2. Step 2: Convert to fraction form
   2,412.29/3,618.56 = 681.05/x
3. Step 3: Cross multiply
   2,412.29x = 3,618.56 × 681.05
4. Step 4: Simplify right side
   2,412.29x = 2,464,420.29
5. Step 5: Solve for x
   x = 2,464,420.29/2,412.29
6. Step 6: Final answer
   x = 1,021.61