Finding the Third Proportional to 20,391 and 42,996

Step by Step Solution

1. Step 1: Write the proportion equation
   20,391 : 42,996 = 42,996 : x
2. Step 2: Convert to fraction form
   20,391/42,996 = 42,996/x
3. Step 3: Cross multiply
   20,391x = 42,996 × 42,996
4. Step 4: Simplify right side
   20,391x = 1,848,656,016
5. Step 5: Solve for x
   x = 1,848,656,016/20,391
6. Step 6: Final answer
   x = 90,660.39