Finding the Third Proportional to 16,215.75 and 20,720.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,215.75 : 20,720.25 = 20,720.25 : x
2. Step 2: Convert to fraction form
   16,215.75/20,720.25 = 20,720.25/x
3. Step 3: Cross multiply
   16,215.75x = 20,720.25 × 20,720.25
4. Step 4: Simplify right side
   16,215.75x = 429,328,760.06
5. Step 5: Solve for x
   x = 429,328,760.06/16,215.75
6. Step 6: Final answer
   x = 26,476.03