Finding the Fourth Proportional to 2,020.81, 3,032.43 and 866.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.81 : 3,032.43 = 866.56 : x
2. Step 2: Convert to fraction form
   2,020.81/3,032.43 = 866.56/x
3. Step 3: Cross multiply
   2,020.81x = 3,032.43 × 866.56
4. Step 4: Simplify right side
   2,020.81x = 2,627,782.54
5. Step 5: Solve for x
   x = 2,627,782.54/2,020.81
6. Step 6: Final answer
   x = 1,300.36