Finding the Third Proportional to 16,569 and 21,531

Step by Step Solution

1. Step 1: Write the proportion equation
   16,569 : 21,531 = 21,531 : x
2. Step 2: Convert to fraction form
   16,569/21,531 = 21,531/x
3. Step 3: Cross multiply
   16,569x = 21,531 × 21,531
4. Step 4: Simplify right side
   16,569x = 463,583,961
5. Step 5: Solve for x
   x = 463,583,961/16,569
6. Step 6: Final answer
   x = 27,978.99