Finding the Fourth Proportional to 2,661.52, 3,993.94 and 1,018.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.52 : 3,993.94 = 1,018.20 : x
2. Step 2: Convert to fraction form
   2,661.52/3,993.94 = 1,018.20/x
3. Step 3: Cross multiply
   2,661.52x = 3,993.94 × 1,018.20
4. Step 4: Simplify right side
   2,661.52x = 4,066,629.71
5. Step 5: Solve for x
   x = 4,066,629.71/2,661.52
6. Step 6: Final answer
   x = 1,527.94