Finding the Third Proportional to 644,432 and 946,910

Step by Step Solution

1. Step 1: Write the proportion equation
   644,432 : 946,910 = 946,910 : x
2. Step 2: Convert to fraction form
   644,432/946,910 = 946,910/x
3. Step 3: Cross multiply
   644,432x = 946,910 × 946,910
4. Step 4: Simplify right side
   644,432x = 896,638,548,100
5. Step 5: Solve for x
   x = 896,638,548,100/644,432
6. Step 6: Final answer
   x = 1,391,362.55