Finding the Third Proportional to 640,950 and 978,375

Step by Step Solution

1. Step 1: Write the proportion equation
   640,950 : 978,375 = 978,375 : x
2. Step 2: Convert to fraction form
   640,950/978,375 = 978,375/x
3. Step 3: Cross multiply
   640,950x = 978,375 × 978,375
4. Step 4: Simplify right side
   640,950x = 957,217,640,625
5. Step 5: Solve for x
   x = 957,217,640,625/640,950
6. Step 6: Final answer
   x = 1,493,435.74