Finding the Third Proportional to 417,783 and 636,466.50

Step by Step Solution

1. Step 1: Write the proportion equation
   417,783 : 636,466.50 = 636,466.50 : x
2. Step 2: Convert to fraction form
   417,783/636,466.50 = 636,466.50/x
3. Step 3: Cross multiply
   417,783x = 636,466.50 × 636,466.50
4. Step 4: Simplify right side
   417,783x = 405,089,605,622.25
5. Step 5: Solve for x
   x = 405,089,605,622.25/417,783
6. Step 6: Final answer
   x = 969,617.25