Finding the Fourth Proportional to 3,786.06, 5,674.89 and 2,858.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,786.06 : 5,674.89 = 2,858.61 : x
2. Step 2: Convert to fraction form
   3,786.06/5,674.89 = 2,858.61/x
3. Step 3: Cross multiply
   3,786.06x = 5,674.89 × 2,858.61
4. Step 4: Simplify right side
   3,786.06x = 16,222,297.30
5. Step 5: Solve for x
   x = 16,222,297.30/3,786.06
6. Step 6: Final answer
   x = 4,284.74