Finding the Third Proportional to 16,622.72 and 21,790.27

Step by Step Solution

1. Step 1: Write the proportion equation
   16,622.72 : 21,790.27 = 21,790.27 : x
2. Step 2: Convert to fraction form
   16,622.72/21,790.27 = 21,790.27/x
3. Step 3: Cross multiply
   16,622.72x = 21,790.27 × 21,790.27
4. Step 4: Simplify right side
   16,622.72x = 474,815,676.01
5. Step 5: Solve for x
   x = 474,815,676.01/16,622.72
6. Step 6: Final answer
   x = 28,564.26