Finding the Third Proportional to 551,922 and 809,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   551,922 : 809,705.50 = 809,705.50 : x
2. Step 2: Convert to fraction form
   551,922/809,705.50 = 809,705.50/x
3. Step 3: Cross multiply
   551,922x = 809,705.50 × 809,705.50
4. Step 4: Simplify right side
   551,922x = 655,622,996,730.25
5. Step 5: Solve for x
   x = 655,622,996,730.25/551,922
6. Step 6: Final answer
   x = 1,187,890.67