Finding the Fourth Proportional to 2,622.16, 3,618.46 and 1,443.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.16 : 3,618.46 = 1,443.21 : x
2. Step 2: Convert to fraction form
   2,622.16/3,618.46 = 1,443.21/x
3. Step 3: Cross multiply
   2,622.16x = 3,618.46 × 1,443.21
4. Step 4: Simplify right side
   2,622.16x = 5,222,177.77
5. Step 5: Solve for x
   x = 5,222,177.77/2,622.16
6. Step 6: Final answer
   x = 1,991.55