Finding the Third Proportional to 20,161 and 42,563

Step by Step Solution

1. Step 1: Write the proportion equation
   20,161 : 42,563 = 42,563 : x
2. Step 2: Convert to fraction form
   20,161/42,563 = 42,563/x
3. Step 3: Cross multiply
   20,161x = 42,563 × 42,563
4. Step 4: Simplify right side
   20,161x = 1,811,608,969
5. Step 5: Solve for x
   x = 1,811,608,969/20,161
6. Step 6: Final answer
   x = 89,857.10