Finding the Third Proportional to 444,540 and 689,368.50

Step by Step Solution

1. Step 1: Write the proportion equation
   444,540 : 689,368.50 = 689,368.50 : x
2. Step 2: Convert to fraction form
   444,540/689,368.50 = 689,368.50/x
3. Step 3: Cross multiply
   444,540x = 689,368.50 × 689,368.50
4. Step 4: Simplify right side
   444,540x = 475,228,928,792.25
5. Step 5: Solve for x
   x = 475,228,928,792.25/444,540
6. Step 6: Final answer
   x = 1,069,035.25