Finding the Third Proportional to 644,274 and 946,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   644,274 : 946,687.50 = 946,687.50 : x
2. Step 2: Convert to fraction form
   644,274/946,687.50 = 946,687.50/x
3. Step 3: Cross multiply
   644,274x = 946,687.50 × 946,687.50
4. Step 4: Simplify right side
   644,274x = 896,217,222,656.25
5. Step 5: Solve for x
   x = 896,217,222,656.25/644,274
6. Step 6: Final answer
   x = 1,391,049.81