Finding the Third Proportional to 408,960 and 620,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   408,960 : 620,788.50 = 620,788.50 : x
2. Step 2: Convert to fraction form
   408,960/620,788.50 = 620,788.50/x
3. Step 3: Cross multiply
   408,960x = 620,788.50 × 620,788.50
4. Step 4: Simplify right side
   408,960x = 385,378,361,732.25
5. Step 5: Solve for x
   x = 385,378,361,732.25/408,960
6. Step 6: Final answer
   x = 942,337.54