Finding the Fourth Proportional to 8,015.38, 12,019.99 and 2,748.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,015.38 : 12,019.99 = 2,748.80 : x
2. Step 2: Convert to fraction form
   8,015.38/12,019.99 = 2,748.80/x
3. Step 3: Cross multiply
   8,015.38x = 12,019.99 × 2,748.80
4. Step 4: Simplify right side
   8,015.38x = 33,040,571.69
5. Step 5: Solve for x
   x = 33,040,571.69/8,015.38
6. Step 6: Final answer
   x = 4,122.15