Finding the Third Proportional to 383,413.50 and 806,487

Step by Step Solution

1. Step 1: Write the proportion equation
   383,413.50 : 806,487 = 806,487 : x
2. Step 2: Convert to fraction form
   383,413.50/806,487 = 806,487/x
3. Step 3: Cross multiply
   383,413.50x = 806,487 × 806,487
4. Step 4: Simplify right side
   383,413.50x = 650,421,281,169
5. Step 5: Solve for x
   x = 650,421,281,169/383,413.50
6. Step 6: Final answer
   x = 1,696,396.40