Finding the Third Proportional to 16,056 and 21,311

Step by Step Solution

1. Step 1: Write the proportion equation
   16,056 : 21,311 = 21,311 : x
2. Step 2: Convert to fraction form
   16,056/21,311 = 21,311/x
3. Step 3: Cross multiply
   16,056x = 21,311 × 21,311
4. Step 4: Simplify right side
   16,056x = 454,158,721
5. Step 5: Solve for x
   x = 454,158,721/16,056
6. Step 6: Final answer
   x = 28,285.92