Finding the Fourth Proportional to 8,067.73, 12,099.37 and 5,720.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,067.73 : 12,099.37 = 5,720.80 : x
2. Step 2: Convert to fraction form
   8,067.73/12,099.37 = 5,720.80/x
3. Step 3: Cross multiply
   8,067.73x = 12,099.37 × 5,720.80
4. Step 4: Simplify right side
   8,067.73x = 69,218,075.90
5. Step 5: Solve for x
   x = 69,218,075.90/8,067.73
6. Step 6: Final answer
   x = 8,579.62