Finding the Third Proportional to 486,361.50 and 776,970

Step by Step Solution

1. Step 1: Write the proportion equation
   486,361.50 : 776,970 = 776,970 : x
2. Step 2: Convert to fraction form
   486,361.50/776,970 = 776,970/x
3. Step 3: Cross multiply
   486,361.50x = 776,970 × 776,970
4. Step 4: Simplify right side
   486,361.50x = 603,682,380,900
5. Step 5: Solve for x
   x = 603,682,380,900/486,361.50
6. Step 6: Final answer
   x = 1,241,221.56