Finding the Third Proportional to 329,728 and 447,872

Step by Step Solution

1. Step 1: Write the proportion equation
   329,728 : 447,872 = 447,872 : x
2. Step 2: Convert to fraction form
   329,728/447,872 = 447,872/x
3. Step 3: Cross multiply
   329,728x = 447,872 × 447,872
4. Step 4: Simplify right side
   329,728x = 200,589,328,384
5. Step 5: Solve for x
   x = 200,589,328,384/329,728
6. Step 6: Final answer
   x = 608,347.88