Finding the Third Proportional to 643,309 and 946,250

Step by Step Solution

1. Step 1: Write the proportion equation
   643,309 : 946,250 = 946,250 : x
2. Step 2: Convert to fraction form
   643,309/946,250 = 946,250/x
3. Step 3: Cross multiply
   643,309x = 946,250 × 946,250
4. Step 4: Simplify right side
   643,309x = 895,389,062,500
5. Step 5: Solve for x
   x = 895,389,062,500/643,309
6. Step 6: Final answer
   x = 1,391,849.12