Finding the Third Proportional to 395,115 and 627,664.50

Step by Step Solution

1. Step 1: Write the proportion equation
   395,115 : 627,664.50 = 627,664.50 : x
2. Step 2: Convert to fraction form
   395,115/627,664.50 = 627,664.50/x
3. Step 3: Cross multiply
   395,115x = 627,664.50 × 627,664.50
4. Step 4: Simplify right side
   395,115x = 393,962,724,560.25
5. Step 5: Solve for x
   x = 393,962,724,560.25/395,115
6. Step 6: Final answer
   x = 997,083.70