Finding the Fourth Proportional to 3,665.20, 5,057.94 and 2,071.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.20 : 5,057.94 = 2,071.82 : x
2. Step 2: Convert to fraction form
   3,665.20/5,057.94 = 2,071.82/x
3. Step 3: Cross multiply
   3,665.20x = 5,057.94 × 2,071.82
4. Step 4: Simplify right side
   3,665.20x = 10,479,141.25
5. Step 5: Solve for x
   x = 10,479,141.25/3,665.20
6. Step 6: Final answer
   x = 2,859.09