Finding the Fourth Proportional to 1,443.58, 2,165.18 and 825.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.58 : 2,165.18 = 825.28 : x
2. Step 2: Convert to fraction form
   1,443.58/2,165.18 = 825.28/x
3. Step 3: Cross multiply
   1,443.58x = 2,165.18 × 825.28
4. Step 4: Simplify right side
   1,443.58x = 1,786,879.75
5. Step 5: Solve for x
   x = 1,786,879.75/1,443.58
6. Step 6: Final answer
   x = 1,237.81