Finding the Third Proportional to 109,220 and 173,666

Step by Step Solution

1. Step 1: Write the proportion equation
   109,220 : 173,666 = 173,666 : x
2. Step 2: Convert to fraction form
   109,220/173,666 = 173,666/x
3. Step 3: Cross multiply
   109,220x = 173,666 × 173,666
4. Step 4: Simplify right side
   109,220x = 30,159,879,556
5. Step 5: Solve for x
   x = 30,159,879,556/109,220
6. Step 6: Final answer
   x = 276,138.80