Finding the Fourth Proportional to 3,786.69, 5,674.79 and 2,861.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.69 : 5,674.79 = 2,861.49 : x
2. Step 2: Convert to fraction form
   3,786.69/5,674.79 = 2,861.49/x
3. Step 3: Cross multiply
   3,786.69x = 5,674.79 × 2,861.49
4. Step 4: Simplify right side
   3,786.69x = 16,238,340.53
5. Step 5: Solve for x
   x = 16,238,340.53/3,786.69
6. Step 6: Final answer
   x = 4,288.27