Finding the Fourth Proportional to 9,399.72, 12,975.82 and 6,214.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,399.72 : 12,975.82 = 6,214.98 : x
2. Step 2: Convert to fraction form
   9,399.72/12,975.82 = 6,214.98/x
3. Step 3: Cross multiply
   9,399.72x = 12,975.82 × 6,214.98
4. Step 4: Simplify right side
   9,399.72x = 80,644,461.78
5. Step 5: Solve for x
   x = 80,644,461.78/9,399.72
6. Step 6: Final answer
   x = 8,579.45