Finding the Third Proportional to 309,413.63 and 492,337.69

Step by Step Solution

1. Step 1: Write the proportion equation
   309,413.63 : 492,337.69 = 492,337.69 : x
2. Step 2: Convert to fraction form
   309,413.63/492,337.69 = 492,337.69/x
3. Step 3: Cross multiply
   309,413.63x = 492,337.69 × 492,337.69
4. Step 4: Simplify right side
   309,413.63x = 242,396,398,532.85
5. Step 5: Solve for x
   x = 242,396,398,532.85/309,413.63
6. Step 6: Final answer
   x = 783,405.70