Finding the Third Proportional to 486,558 and 774,805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   486,558 : 774,805.50 = 774,805.50 : x
2. Step 2: Convert to fraction form
   486,558/774,805.50 = 774,805.50/x
3. Step 3: Cross multiply
   486,558x = 774,805.50 × 774,805.50
4. Step 4: Simplify right side
   486,558x = 600,323,562,830.25
5. Step 5: Solve for x
   x = 600,323,562,830.25/486,558
6. Step 6: Final answer
   x = 1,233,817.06