Finding the Third Proportional to 16,216.75 and 20,721.25

Step by Step Solution

1. Step 1: Write the proportion equation
   16,216.75 : 20,721.25 = 20,721.25 : x
2. Step 2: Convert to fraction form
   16,216.75/20,721.25 = 20,721.25/x
3. Step 3: Cross multiply
   16,216.75x = 20,721.25 × 20,721.25
4. Step 4: Simplify right side
   16,216.75x = 429,370,201.56
5. Step 5: Solve for x
   x = 429,370,201.56/16,216.75
6. Step 6: Final answer
   x = 26,476.96