Finding the Third Proportional to 108,990 and 168,831

Step by Step Solution

1. Step 1: Write the proportion equation
   108,990 : 168,831 = 168,831 : x
2. Step 2: Convert to fraction form
   108,990/168,831 = 168,831/x
3. Step 3: Cross multiply
   108,990x = 168,831 × 168,831
4. Step 4: Simplify right side
   108,990x = 28,503,906,561
5. Step 5: Solve for x
   x = 28,503,906,561/108,990
6. Step 6: Final answer
   x = 261,527.72