Finding the Fourth Proportional to 2,662.67, 3,993.86 and 1,019.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.67 : 3,993.86 = 1,019.09 : x
2. Step 2: Convert to fraction form
   2,662.67/3,993.86 = 1,019.09/x
3. Step 3: Cross multiply
   2,662.67x = 3,993.86 × 1,019.09
4. Step 4: Simplify right side
   2,662.67x = 4,070,077.72
5. Step 5: Solve for x
   x = 4,070,077.72/2,662.67
6. Step 6: Final answer
   x = 1,528.57