Finding the Fourth Proportional to 2,123.27, 3,181.94 and 1,809.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.27 : 3,181.94 = 1,809.28 : x
2. Step 2: Convert to fraction form
   2,123.27/3,181.94 = 1,809.28/x
3. Step 3: Cross multiply
   2,123.27x = 3,181.94 × 1,809.28
4. Step 4: Simplify right side
   2,123.27x = 5,757,022.12
5. Step 5: Solve for x
   x = 5,757,022.12/2,123.27
6. Step 6: Final answer
   x = 2,711.40