Finding the Fourth Proportional to 2,019.65, 3,027.83 and 866.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.65 : 3,027.83 = 866.21 : x
2. Step 2: Convert to fraction form
   2,019.65/3,027.83 = 866.21/x
3. Step 3: Cross multiply
   2,019.65x = 3,027.83 × 866.21
4. Step 4: Simplify right side
   2,019.65x = 2,622,717.15
5. Step 5: Solve for x
   x = 2,622,717.15/2,019.65
6. Step 6: Final answer
   x = 1,298.60