Finding the Third Proportional to 298,272 and 447,648

Step by Step Solution

1. Step 1: Write the proportion equation
   298,272 : 447,648 = 447,648 : x
2. Step 2: Convert to fraction form
   298,272/447,648 = 447,648/x
3. Step 3: Cross multiply
   298,272x = 447,648 × 447,648
4. Step 4: Simplify right side
   298,272x = 200,388,731,904
5. Step 5: Solve for x
   x = 200,388,731,904/298,272
6. Step 6: Final answer
   x = 671,832.19