Finding the Fourth Proportional to 2,622.20, 3,618.66 and 1,443.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.20 : 3,618.66 = 1,443.24 : x
2. Step 2: Convert to fraction form
   2,622.20/3,618.66 = 1,443.24/x
3. Step 3: Cross multiply
   2,622.20x = 3,618.66 × 1,443.24
4. Step 4: Simplify right side
   2,622.20x = 5,222,594.86
5. Step 5: Solve for x
   x = 5,222,594.86/2,622.20
6. Step 6: Final answer
   x = 1,991.69