Finding the Fourth Proportional to 8,028.72, 12,015.48 and 5,065.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,028.72 : 12,015.48 = 5,065.80 : x
2. Step 2: Convert to fraction form
   8,028.72/12,015.48 = 5,065.80/x
3. Step 3: Cross multiply
   8,028.72x = 12,015.48 × 5,065.80
4. Step 4: Simplify right side
   8,028.72x = 60,868,018.58
5. Step 5: Solve for x
   x = 60,868,018.58/8,028.72
6. Step 6: Final answer
   x = 7,581.29