Finding the Third Proportional to 297,169 and 648,499

Step by Step Solution

1. Step 1: Write the proportion equation
   297,169 : 648,499 = 648,499 : x
2. Step 2: Convert to fraction form
   297,169/648,499 = 648,499/x
3. Step 3: Cross multiply
   297,169x = 648,499 × 648,499
4. Step 4: Simplify right side
   297,169x = 420,550,953,001
5. Step 5: Solve for x
   x = 420,550,953,001/297,169
6. Step 6: Final answer
   x = 1,415,191.20