Finding the Third Proportional to 4,472.72 and 9,683.30

Step by Step Solution

1. Step 1: Write the proportion equation
   4,472.72 : 9,683.30 = 9,683.30 : x
2. Step 2: Convert to fraction form
   4,472.72/9,683.30 = 9,683.30/x
3. Step 3: Cross multiply
   4,472.72x = 9,683.30 × 9,683.30
4. Step 4: Simplify right side
   4,472.72x = 93,766,238.37
5. Step 5: Solve for x
   x = 93,766,238.37/4,472.72
6. Step 6: Final answer
   x = 20,964.04