Finding the Third Proportional to 306,972 and 629,158.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,972 : 629,158.50 = 629,158.50 : x
2. Step 2: Convert to fraction form
   306,972/629,158.50 = 629,158.50/x
3. Step 3: Cross multiply
   306,972x = 629,158.50 × 629,158.50
4. Step 4: Simplify right side
   306,972x = 395,840,418,122.25
5. Step 5: Solve for x
   x = 395,840,418,122.25/306,972
6. Step 6: Final answer
   x = 1,289,500.08