Finding the Third Proportional to 644,436 and 946,916

Step by Step Solution

1. Step 1: Write the proportion equation
   644,436 : 946,916 = 946,916 : x
2. Step 2: Convert to fraction form
   644,436/946,916 = 946,916/x
3. Step 3: Cross multiply
   644,436x = 946,916 × 946,916
4. Step 4: Simplify right side
   644,436x = 896,649,911,056
5. Step 5: Solve for x
   x = 896,649,911,056/644,436
6. Step 6: Final answer
   x = 1,391,371.54