Finding the Third Proportional to 296,310 and 648,834

Step by Step Solution

1. Step 1: Write the proportion equation
   296,310 : 648,834 = 648,834 : x
2. Step 2: Convert to fraction form
   296,310/648,834 = 648,834/x
3. Step 3: Cross multiply
   296,310x = 648,834 × 648,834
4. Step 4: Simplify right side
   296,310x = 420,985,559,556
5. Step 5: Solve for x
   x = 420,985,559,556/296,310
6. Step 6: Final answer
   x = 1,420,760.55