Finding the Fourth Proportional to 2,189.72, 3,020.90 and 1,350.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.72 : 3,020.90 = 1,350.16 : x
2. Step 2: Convert to fraction form
   2,189.72/3,020.90 = 1,350.16/x
3. Step 3: Cross multiply
   2,189.72x = 3,020.90 × 1,350.16
4. Step 4: Simplify right side
   2,189.72x = 4,078,698.34
5. Step 5: Solve for x
   x = 4,078,698.34/2,189.72
6. Step 6: Final answer
   x = 1,862.66