Finding the Third Proportional to 309,244.50 and 670,968

Step by Step Solution

1. Step 1: Write the proportion equation
   309,244.50 : 670,968 = 670,968 : x
2. Step 2: Convert to fraction form
   309,244.50/670,968 = 670,968/x
3. Step 3: Cross multiply
   309,244.50x = 670,968 × 670,968
4. Step 4: Simplify right side
   309,244.50x = 450,198,057,024
5. Step 5: Solve for x
   x = 450,198,057,024/309,244.50
6. Step 6: Final answer
   x = 1,455,799.72