Finding the Fourth Proportional to 1,443.72, 2,162.58 and 866.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.72 : 2,162.58 = 866.28 : x
2. Step 2: Convert to fraction form
   1,443.72/2,162.58 = 866.28/x
3. Step 3: Cross multiply
   1,443.72x = 2,162.58 × 866.28
4. Step 4: Simplify right side
   1,443.72x = 1,873,399.80
5. Step 5: Solve for x
   x = 1,873,399.80/1,443.72
6. Step 6: Final answer
   x = 1,297.62