Finding the Fourth Proportional to 2,189.34, 3,020.83 and 1,305.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.34 : 3,020.83 = 1,305.43 : x
2. Step 2: Convert to fraction form
   2,189.34/3,020.83 = 1,305.43/x
3. Step 3: Cross multiply
   2,189.34x = 3,020.83 × 1,305.43
4. Step 4: Simplify right side
   2,189.34x = 3,943,471.29
5. Step 5: Solve for x
   x = 3,943,471.29/2,189.34
6. Step 6: Final answer
   x = 1,801.21