Finding the Third Proportional to 378,228 and 809,971.50

Step by Step Solution

1. Step 1: Write the proportion equation
   378,228 : 809,971.50 = 809,971.50 : x
2. Step 2: Convert to fraction form
   378,228/809,971.50 = 809,971.50/x
3. Step 3: Cross multiply
   378,228x = 809,971.50 × 809,971.50
4. Step 4: Simplify right side
   378,228x = 656,053,830,812.25
5. Step 5: Solve for x
   x = 656,053,830,812.25/378,228
6. Step 6: Final answer
   x = 1,734,545.91