Finding the Third Proportional to 16,216.50 and 20,721

Step by Step Solution

1. Step 1: Write the proportion equation
   16,216.50 : 20,721 = 20,721 : x
2. Step 2: Convert to fraction form
   16,216.50/20,721 = 20,721/x
3. Step 3: Cross multiply
   16,216.50x = 20,721 × 20,721
4. Step 4: Simplify right side
   16,216.50x = 429,359,841
5. Step 5: Solve for x
   x = 429,359,841/16,216.50
6. Step 6: Final answer
   x = 26,476.73