Finding the Fourth Proportional to 2,622.17, 3,618.65 and 1,443.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.17 : 3,618.65 = 1,443.25 : x
2. Step 2: Convert to fraction form
   2,622.17/3,618.65 = 1,443.25/x
3. Step 3: Cross multiply
   2,622.17x = 3,618.65 × 1,443.25
4. Step 4: Simplify right side
   2,622.17x = 5,222,598.52
5. Step 5: Solve for x
   x = 5,222,598.52/2,622.17
6. Step 6: Final answer
   x = 1,991.71