Finding the Third Proportional to 111,921 and 173,556

Step by Step Solution

1. Step 1: Write the proportion equation
   111,921 : 173,556 = 173,556 : x
2. Step 2: Convert to fraction form
   111,921/173,556 = 173,556/x
3. Step 3: Cross multiply
   111,921x = 173,556 × 173,556
4. Step 4: Simplify right side
   111,921x = 30,121,685,136
5. Step 5: Solve for x
   x = 30,121,685,136/111,921
6. Step 6: Final answer
   x = 269,133.45