Finding the Third Proportional to 297,906 and 648,336

Step by Step Solution

1. Step 1: Write the proportion equation
   297,906 : 648,336 = 648,336 : x
2. Step 2: Convert to fraction form
   297,906/648,336 = 648,336/x
3. Step 3: Cross multiply
   297,906x = 648,336 × 648,336
4. Step 4: Simplify right side
   297,906x = 420,339,568,896
5. Step 5: Solve for x
   x = 420,339,568,896/297,906
6. Step 6: Final answer
   x = 1,410,980.54