Finding the Fourth Proportional to 3,896.87, 5,854.35 and 3,687.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,896.87 : 5,854.35 = 3,687.08 : x
2. Step 2: Convert to fraction form
   3,896.87/5,854.35 = 3,687.08/x
3. Step 3: Cross multiply
   3,896.87x = 5,854.35 × 3,687.08
4. Step 4: Simplify right side
   3,896.87x = 21,585,456.80
5. Step 5: Solve for x
   x = 21,585,456.80/3,896.87
6. Step 6: Final answer
   x = 5,539.18