Finding the Third Proportional to 16,776 and 21,516

Step by Step Solution

1. Step 1: Write the proportion equation
   16,776 : 21,516 = 21,516 : x
2. Step 2: Convert to fraction form
   16,776/21,516 = 21,516/x
3. Step 3: Cross multiply
   16,776x = 21,516 × 21,516
4. Step 4: Simplify right side
   16,776x = 462,938,256
5. Step 5: Solve for x
   x = 462,938,256/16,776
6. Step 6: Final answer
   x = 27,595.27