Finding the Fourth Proportional to 2,436.57, 3,654.77 and 681.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.57 : 3,654.77 = 681.57 : x
2. Step 2: Convert to fraction form
   2,436.57/3,654.77 = 681.57/x
3. Step 3: Cross multiply
   2,436.57x = 3,654.77 × 681.57
4. Step 4: Simplify right side
   2,436.57x = 2,490,987.32
5. Step 5: Solve for x
   x = 2,490,987.32/2,436.57
6. Step 6: Final answer
   x = 1,022.33