Finding the Fourth Proportional to 2,189.87, 3,022.41 and 1,305.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.87 : 3,022.41 = 1,305.73 : x
2. Step 2: Convert to fraction form
   2,189.87/3,022.41 = 1,305.73/x
3. Step 3: Cross multiply
   2,189.87x = 3,022.41 × 1,305.73
4. Step 4: Simplify right side
   2,189.87x = 3,946,451.41
5. Step 5: Solve for x
   x = 3,946,451.41/2,189.87
6. Step 6: Final answer
   x = 1,802.14