Finding the Third Proportional to 306,936 and 628,632.56

Step by Step Solution

1. Step 1: Write the proportion equation
   306,936 : 628,632.56 = 628,632.56 : x
2. Step 2: Convert to fraction form
   306,936/628,632.56 = 628,632.56/x
3. Step 3: Cross multiply
   306,936x = 628,632.56 × 628,632.56
4. Step 4: Simplify right side
   306,936x = 395,178,898,635.32
5. Step 5: Solve for x
   x = 395,178,898,635.32/306,936
6. Step 6: Final answer
   x = 1,287,496.09