Finding the Fourth Proportional to 2,622.40, 3,618.82 and 1,443.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.40 : 3,618.82 = 1,443.44 : x
2. Step 2: Convert to fraction form
   2,622.40/3,618.82 = 1,443.44/x
3. Step 3: Cross multiply
   2,622.40x = 3,618.82 × 1,443.44
4. Step 4: Simplify right side
   2,622.40x = 5,223,549.54
5. Step 5: Solve for x
   x = 5,223,549.54/2,622.40
6. Step 6: Final answer
   x = 1,991.90