Finding the Third Proportional to 111,909 and 173,283

Step by Step Solution

1. Step 1: Write the proportion equation
   111,909 : 173,283 = 173,283 : x
2. Step 2: Convert to fraction form
   111,909/173,283 = 173,283/x
3. Step 3: Cross multiply
   111,909x = 173,283 × 173,283
4. Step 4: Simplify right side
   111,909x = 30,026,998,089
5. Step 5: Solve for x
   x = 30,026,998,089/111,909
6. Step 6: Final answer
   x = 268,316.20