Finding the Third Proportional to 306,735 and 628,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,735 : 628,343.50 = 628,343.50 : x
2. Step 2: Convert to fraction form
   306,735/628,343.50 = 628,343.50/x
3. Step 3: Cross multiply
   306,735x = 628,343.50 × 628,343.50
4. Step 4: Simplify right side
   306,735x = 394,815,553,992.25
5. Step 5: Solve for x
   x = 394,815,553,992.25/306,735
6. Step 6: Final answer
   x = 1,287,155.21