Finding the Third Proportional to 8,809.50 and 13,215.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,809.50 : 13,215.38 = 13,215.38 : x
2. Step 2: Convert to fraction form
   8,809.50/13,215.38 = 13,215.38/x
3. Step 3: Cross multiply
   8,809.50x = 13,215.38 × 13,215.38
4. Step 4: Simplify right side
   8,809.50x = 174,646,136.39
5. Step 5: Solve for x
   x = 174,646,136.39/8,809.50
6. Step 6: Final answer
   x = 19,824.75