Finding the Third Proportional to 296,318 and 648,850

Step by Step Solution

1. Step 1: Write the proportion equation
   296,318 : 648,850 = 648,850 : x
2. Step 2: Convert to fraction form
   296,318/648,850 = 648,850/x
3. Step 3: Cross multiply
   296,318x = 648,850 × 648,850
4. Step 4: Simplify right side
   296,318x = 421,006,322,500
5. Step 5: Solve for x
   x = 421,006,322,500/296,318
6. Step 6: Final answer
   x = 1,420,792.27