Finding the Third Proportional to 299,727 and 641,965.50

Step by Step Solution

1. Step 1: Write the proportion equation
   299,727 : 641,965.50 = 641,965.50 : x
2. Step 2: Convert to fraction form
   299,727/641,965.50 = 641,965.50/x
3. Step 3: Cross multiply
   299,727x = 641,965.50 × 641,965.50
4. Step 4: Simplify right side
   299,727x = 412,119,703,190.25
5. Step 5: Solve for x
   x = 412,119,703,190.25/299,727
6. Step 6: Final answer
   x = 1,374,983.58