Finding the Third Proportional to 809,694 and 1,210,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   809,694 : 1,210,078.50 = 1,210,078.50 : x
2. Step 2: Convert to fraction form
   809,694/1,210,078.50 = 1,210,078.50/x
3. Step 3: Cross multiply
   809,694x = 1,210,078.50 × 1,210,078.50
4. Step 4: Simplify right side
   809,694x = 1,464,289,976,162.25
5. Step 5: Solve for x
   x = 1,464,289,976,162.25/809,694
6. Step 6: Final answer
   x = 1,808,448.59