Finding the Third Proportional to 18,609 and 40,499

Step by Step Solution

1. Step 1: Write the proportion equation
   18,609 : 40,499 = 40,499 : x
2. Step 2: Convert to fraction form
   18,609/40,499 = 40,499/x
3. Step 3: Cross multiply
   18,609x = 40,499 × 40,499
4. Step 4: Simplify right side
   18,609x = 1,640,169,001
5. Step 5: Solve for x
   x = 1,640,169,001/18,609
6. Step 6: Final answer
   x = 88,138.48