Finding the Third Proportional to 486,406 and 777,036.50

Step by Step Solution

1. Step 1: Write the proportion equation
   486,406 : 777,036.50 = 777,036.50 : x
2. Step 2: Convert to fraction form
   486,406/777,036.50 = 777,036.50/x
3. Step 3: Cross multiply
   486,406x = 777,036.50 × 777,036.50
4. Step 4: Simplify right side
   486,406x = 603,785,722,332.25
5. Step 5: Solve for x
   x = 603,785,722,332.25/486,406
6. Step 6: Final answer
   x = 1,241,320.47