Finding the Fourth Proportional to 8,018.28, 12,019.23 and 3,086.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,018.28 : 12,019.23 = 3,086.64 : x
2. Step 2: Convert to fraction form
   8,018.28/12,019.23 = 3,086.64/x
3. Step 3: Cross multiply
   8,018.28x = 12,019.23 × 3,086.64
4. Step 4: Simplify right side
   8,018.28x = 37,099,036.09
5. Step 5: Solve for x
   x = 37,099,036.09/8,018.28
6. Step 6: Final answer
   x = 4,626.81