Finding the Third Proportional to 644,899.50 and 946,435.50

Step by Step Solution

1. Step 1: Write the proportion equation
   644,899.50 : 946,435.50 = 946,435.50 : x
2. Step 2: Convert to fraction form
   644,899.50/946,435.50 = 946,435.50/x
3. Step 3: Cross multiply
   644,899.50x = 946,435.50 × 946,435.50
4. Step 4: Simplify right side
   644,899.50x = 895,740,155,660.25
5. Step 5: Solve for x
   x = 895,740,155,660.25/644,899.50
6. Step 6: Final answer
   x = 1,388,960.85