Finding the Third Proportional to 111,911.50 and 173,540

Step by Step Solution

1. Step 1: Write the proportion equation
   111,911.50 : 173,540 = 173,540 : x
2. Step 2: Convert to fraction form
   111,911.50/173,540 = 173,540/x
3. Step 3: Cross multiply
   111,911.50x = 173,540 × 173,540
4. Step 4: Simplify right side
   111,911.50x = 30,116,131,600
5. Step 5: Solve for x
   x = 30,116,131,600/111,911.50
6. Step 6: Final answer
   x = 269,106.67