Finding the Third Proportional to 309,698 and 670,084

Step by Step Solution

1. Step 1: Write the proportion equation
   309,698 : 670,084 = 670,084 : x
2. Step 2: Convert to fraction form
   309,698/670,084 = 670,084/x
3. Step 3: Cross multiply
   309,698x = 670,084 × 670,084
4. Step 4: Simplify right side
   309,698x = 449,012,567,056
5. Step 5: Solve for x
   x = 449,012,567,056/309,698
6. Step 6: Final answer
   x = 1,449,840.06