Finding the Third Proportional to 13,972 and 21,055

Step by Step Solution

1. Step 1: Write the proportion equation
   13,972 : 21,055 = 21,055 : x
2. Step 2: Convert to fraction form
   13,972/21,055 = 21,055/x
3. Step 3: Cross multiply
   13,972x = 21,055 × 21,055
4. Step 4: Simplify right side
   13,972x = 443,313,025
5. Step 5: Solve for x
   x = 443,313,025/13,972
6. Step 6: Final answer
   x = 31,728.67