Finding the Fourth Proportional to 2,662.12, 3,993.21 and 1,018.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.12 : 3,993.21 = 1,018.75 : x
2. Step 2: Convert to fraction form
   2,662.12/3,993.21 = 1,018.75/x
3. Step 3: Cross multiply
   2,662.12x = 3,993.21 × 1,018.75
4. Step 4: Simplify right side
   2,662.12x = 4,068,062.72
5. Step 5: Solve for x
   x = 4,068,062.72/2,662.12
6. Step 6: Final answer
   x = 1,528.13