Finding the Fourth Proportional to 3,665.96, 5,059.13 and 2,072.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.96 : 5,059.13 = 2,072.28 : x
2. Step 2: Convert to fraction form
   3,665.96/5,059.13 = 2,072.28/x
3. Step 3: Cross multiply
   3,665.96x = 5,059.13 × 2,072.28
4. Step 4: Simplify right side
   3,665.96x = 10,483,942.53
5. Step 5: Solve for x
   x = 10,483,942.53/3,665.96
6. Step 6: Final answer
   x = 2,859.81