Finding the Fourth Proportional to 3,615.57, 4,989.78 and 2,022.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.57 : 4,989.78 = 2,022.57 : x
2. Step 2: Convert to fraction form
   3,615.57/4,989.78 = 2,022.57/x
3. Step 3: Cross multiply
   3,615.57x = 4,989.78 × 2,022.57
4. Step 4: Simplify right side
   3,615.57x = 10,092,179.33
5. Step 5: Solve for x
   x = 10,092,179.33/3,615.57
6. Step 6: Final answer
   x = 2,791.31