Finding the Third Proportional to 21,224 and 28,722

Step by Step Solution

1. Step 1: Write the proportion equation
   21,224 : 28,722 = 28,722 : x
2. Step 2: Convert to fraction form
   21,224/28,722 = 28,722/x
3. Step 3: Cross multiply
   21,224x = 28,722 × 28,722
4. Step 4: Simplify right side
   21,224x = 824,953,284
5. Step 5: Solve for x
   x = 824,953,284/21,224
6. Step 6: Final answer
   x = 38,868.89