Finding the Third Proportional to 20,906 and 30,690

Step by Step Solution

1. Step 1: Write the proportion equation
   20,906 : 30,690 = 30,690 : x
2. Step 2: Convert to fraction form
   20,906/30,690 = 30,690/x
3. Step 3: Cross multiply
   20,906x = 30,690 × 30,690
4. Step 4: Simplify right side
   20,906x = 941,876,100
5. Step 5: Solve for x
   x = 941,876,100/20,906
6. Step 6: Final answer
   x = 45,052.91