Finding the Third Proportional to 486,831 and 711,409.50

Step by Step Solution

1. Step 1: Write the proportion equation
   486,831 : 711,409.50 = 711,409.50 : x
2. Step 2: Convert to fraction form
   486,831/711,409.50 = 711,409.50/x
3. Step 3: Cross multiply
   486,831x = 711,409.50 × 711,409.50
4. Step 4: Simplify right side
   486,831x = 506,103,476,690.25
5. Step 5: Solve for x
   x = 506,103,476,690.25/486,831
6. Step 6: Final answer
   x = 1,039,587.61