Finding the Third Proportional to 23,715 and 31,721

Step by Step Solution

1. Step 1: Write the proportion equation
   23,715 : 31,721 = 31,721 : x
2. Step 2: Convert to fraction form
   23,715/31,721 = 31,721/x
3. Step 3: Cross multiply
   23,715x = 31,721 × 31,721
4. Step 4: Simplify right side
   23,715x = 1,006,221,841
5. Step 5: Solve for x
   x = 1,006,221,841/23,715
6. Step 6: Final answer
   x = 42,429.76