Finding the Third Proportional to 486,009 and 757,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   486,009 : 757,039.50 = 757,039.50 : x
2. Step 2: Convert to fraction form
   486,009/757,039.50 = 757,039.50/x
3. Step 3: Cross multiply
   486,009x = 757,039.50 × 757,039.50
4. Step 4: Simplify right side
   486,009x = 573,108,804,560.25
5. Step 5: Solve for x
   x = 573,108,804,560.25/486,009
6. Step 6: Final answer
   x = 1,179,214.39