Finding the Fourth Proportional to 3,665.89, 5,057.73 and 2,072.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.89 : 5,057.73 = 2,072.38 : x
2. Step 2: Convert to fraction form
   3,665.89/5,057.73 = 2,072.38/x
3. Step 3: Cross multiply
   3,665.89x = 5,057.73 × 2,072.38
4. Step 4: Simplify right side
   3,665.89x = 10,481,541.16
5. Step 5: Solve for x
   x = 10,481,541.16/3,665.89
6. Step 6: Final answer
   x = 2,859.21