Finding the Third Proportional to 21,073 and 30,831

Step by Step Solution

1. Step 1: Write the proportion equation
   21,073 : 30,831 = 30,831 : x
2. Step 2: Convert to fraction form
   21,073/30,831 = 30,831/x
3. Step 3: Cross multiply
   21,073x = 30,831 × 30,831
4. Step 4: Simplify right side
   21,073x = 950,550,561
5. Step 5: Solve for x
   x = 950,550,561/21,073
6. Step 6: Final answer
   x = 45,107.51