Finding the Fourth Proportional to 2,021.27, 3,031.37 and 866.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.27 : 3,031.37 = 866.75 : x
2. Step 2: Convert to fraction form
   2,021.27/3,031.37 = 866.75/x
3. Step 3: Cross multiply
   2,021.27x = 3,031.37 × 866.75
4. Step 4: Simplify right side
   2,021.27x = 2,627,435.61
5. Step 5: Solve for x
   x = 2,627,435.61/2,021.27
6. Step 6: Final answer
   x = 1,299.89