Finding the Third Proportional to 329,676 and 447,840

Step by Step Solution

1. Step 1: Write the proportion equation
   329,676 : 447,840 = 447,840 : x
2. Step 2: Convert to fraction form
   329,676/447,840 = 447,840/x
3. Step 3: Cross multiply
   329,676x = 447,840 × 447,840
4. Step 4: Simplify right side
   329,676x = 200,560,665,600
5. Step 5: Solve for x
   x = 200,560,665,600/329,676
6. Step 6: Final answer
   x = 608,356.89