Finding the Fourth Proportional to 3,665.55, 5,057.59 and 2,072.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.55 : 5,057.59 = 2,072.23 : x
2. Step 2: Convert to fraction form
   3,665.55/5,057.59 = 2,072.23/x
3. Step 3: Cross multiply
   3,665.55x = 5,057.59 × 2,072.23
4. Step 4: Simplify right side
   3,665.55x = 10,480,504.24
5. Step 5: Solve for x
   x = 10,480,504.24/3,665.55
6. Step 6: Final answer
   x = 2,859.19