Finding the Fourth Proportional to 2,439.82, 3,661.78 and 2,286.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,439.82 : 3,661.78 = 2,286.05 : x
2. Step 2: Convert to fraction form
   2,439.82/3,661.78 = 2,286.05/x
3. Step 3: Cross multiply
   2,439.82x = 3,661.78 × 2,286.05
4. Step 4: Simplify right side
   2,439.82x = 8,370,982.43
5. Step 5: Solve for x
   x = 8,370,982.43/2,439.82
6. Step 6: Final answer
   x = 3,430.99