Finding the Third Proportional to 444,840 and 689,380.50

Step by Step Solution

1. Step 1: Write the proportion equation
   444,840 : 689,380.50 = 689,380.50 : x
2. Step 2: Convert to fraction form
   444,840/689,380.50 = 689,380.50/x
3. Step 3: Cross multiply
   444,840x = 689,380.50 × 689,380.50
4. Step 4: Simplify right side
   444,840x = 475,245,473,780.25
5. Step 5: Solve for x
   x = 475,245,473,780.25/444,840
6. Step 6: Final answer
   x = 1,068,351.48