Finding the Fourth Proportional to 8,199.72, 12,308.72 and 4,249.92

Step by Step Solution

1. Step 1: Write the proportion equation
   8,199.72 : 12,308.72 = 4,249.92 : x
2. Step 2: Convert to fraction form
   8,199.72/12,308.72 = 4,249.92/x
3. Step 3: Cross multiply
   8,199.72x = 12,308.72 × 4,249.92
4. Step 4: Simplify right side
   8,199.72x = 52,311,075.30
5. Step 5: Solve for x
   x = 52,311,075.30/8,199.72
6. Step 6: Final answer
   x = 6,379.62