Finding the Fourth Proportional to 3,843.69, 5,759.96 and 2,087.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,843.69 : 5,759.96 = 2,087.21 : x
2. Step 2: Convert to fraction form
   3,843.69/5,759.96 = 2,087.21/x
3. Step 3: Cross multiply
   3,843.69x = 5,759.96 × 2,087.21
4. Step 4: Simplify right side
   3,843.69x = 12,022,206.88
5. Step 5: Solve for x
   x = 12,022,206.88/3,843.69
6. Step 6: Final answer
   x = 3,127.78