Finding the Fourth Proportional to 2,190.38, 3,020.69 and 1,443.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.38 : 3,020.69 = 1,443.05 : x
2. Step 2: Convert to fraction form
   2,190.38/3,020.69 = 1,443.05/x
3. Step 3: Cross multiply
   2,190.38x = 3,020.69 × 1,443.05
4. Step 4: Simplify right side
   2,190.38x = 4,358,984.39
5. Step 5: Solve for x
   x = 4,358,984.39/2,190.38
6. Step 6: Final answer
   x = 1,990.06