Finding the Third Proportional to 72,831 and 109,915

Step by Step Solution

1. Step 1: Write the proportion equation
   72,831 : 109,915 = 109,915 : x
2. Step 2: Convert to fraction form
   72,831/109,915 = 109,915/x
3. Step 3: Cross multiply
   72,831x = 109,915 × 109,915
4. Step 4: Simplify right side
   72,831x = 12,081,307,225
5. Step 5: Solve for x
   x = 12,081,307,225/72,831
6. Step 6: Final answer
   x = 165,881.39