Finding the Third Proportional to 72,609 and 108,909

Step by Step Solution

1. Step 1: Write the proportion equation
   72,609 : 108,909 = 108,909 : x
2. Step 2: Convert to fraction form
   72,609/108,909 = 108,909/x
3. Step 3: Cross multiply
   72,609x = 108,909 × 108,909
4. Step 4: Simplify right side
   72,609x = 11,861,170,281
5. Step 5: Solve for x
   x = 11,861,170,281/72,609
6. Step 6: Final answer
   x = 163,356.75