Finding the Fourth Proportional to 2,622.07, 3,618.53 and 1,443.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,622.07 : 3,618.53 = 1,443.12 : x
2. Step 2: Convert to fraction form
   2,622.07/3,618.53 = 1,443.12/x
3. Step 3: Cross multiply
   2,622.07x = 3,618.53 × 1,443.12
4. Step 4: Simplify right side
   2,622.07x = 5,221,973.01
5. Step 5: Solve for x
   x = 5,221,973.01/2,622.07
6. Step 6: Final answer
   x = 1,991.55