Finding the Third Proportional to 644,436 and 995,814

Step by Step Solution

1. Step 1: Write the proportion equation
   644,436 : 995,814 = 995,814 : x
2. Step 2: Convert to fraction form
   644,436/995,814 = 995,814/x
3. Step 3: Cross multiply
   644,436x = 995,814 × 995,814
4. Step 4: Simplify right side
   644,436x = 991,645,522,596
5. Step 5: Solve for x
   x = 991,645,522,596/644,436
6. Step 6: Final answer
   x = 1,538,780.46