Finding the Third Proportional to 298,060 and 648,728

Step by Step Solution

1. Step 1: Write the proportion equation
   298,060 : 648,728 = 648,728 : x
2. Step 2: Convert to fraction form
   298,060/648,728 = 648,728/x
3. Step 3: Cross multiply
   298,060x = 648,728 × 648,728
4. Step 4: Simplify right side
   298,060x = 420,848,017,984
5. Step 5: Solve for x
   x = 420,848,017,984/298,060
6. Step 6: Final answer
   x = 1,411,957.38