Finding the Third Proportional to 297,816 and 648,108

Step by Step Solution

1. Step 1: Write the proportion equation
   297,816 : 648,108 = 648,108 : x
2. Step 2: Convert to fraction form
   297,816/648,108 = 648,108/x
3. Step 3: Cross multiply
   297,816x = 648,108 × 648,108
4. Step 4: Simplify right side
   297,816x = 420,043,979,664
5. Step 5: Solve for x
   x = 420,043,979,664/297,816
6. Step 6: Final answer
   x = 1,410,414.42