Finding the Third Proportional to 296,220 and 648,694.50

Step by Step Solution

1. Step 1: Write the proportion equation
   296,220 : 648,694.50 = 648,694.50 : x
2. Step 2: Convert to fraction form
   296,220/648,694.50 = 648,694.50/x
3. Step 3: Cross multiply
   296,220x = 648,694.50 × 648,694.50
4. Step 4: Simplify right side
   296,220x = 420,804,554,330.25
5. Step 5: Solve for x
   x = 420,804,554,330.25/296,220
6. Step 6: Final answer
   x = 1,420,581.17