Finding the Third Proportional to 20,456 and 43,099

Step by Step Solution

1. Step 1: Write the proportion equation
   20,456 : 43,099 = 43,099 : x
2. Step 2: Convert to fraction form
   20,456/43,099 = 43,099/x
3. Step 3: Cross multiply
   20,456x = 43,099 × 43,099
4. Step 4: Simplify right side
   20,456x = 1,857,523,801
5. Step 5: Solve for x
   x = 1,857,523,801/20,456
6. Step 6: Final answer
   x = 90,805.82