Finding the Third Proportional to 72,720 and 154,230

Step by Step Solution

1. Step 1: Write the proportion equation
   72,720 : 154,230 = 154,230 : x
2. Step 2: Convert to fraction form
   72,720/154,230 = 154,230/x
3. Step 3: Cross multiply
   72,720x = 154,230 × 154,230
4. Step 4: Simplify right side
   72,720x = 23,786,892,900
5. Step 5: Solve for x
   x = 23,786,892,900/72,720
6. Step 6: Final answer
   x = 327,102.49