Finding the Third Proportional to 9,721.69 and 14,578.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.69 : 14,578.31 = 14,578.31 : x
2. Step 2: Convert to fraction form
   9,721.69/14,578.31 = 14,578.31/x
3. Step 3: Cross multiply
   9,721.69x = 14,578.31 × 14,578.31
4. Step 4: Simplify right side
   9,721.69x = 212,527,195.35
5. Step 5: Solve for x
   x = 212,527,195.35/9,721.69
6. Step 6: Final answer
   x = 21,861.14