Finding the Third Proportional to 809,680 and 1,210,059

Step by Step Solution

1. Step 1: Write the proportion equation
   809,680 : 1,210,059 = 1,210,059 : x
2. Step 2: Convert to fraction form
   809,680/1,210,059 = 1,210,059/x
3. Step 3: Cross multiply
   809,680x = 1,210,059 × 1,210,059
4. Step 4: Simplify right side
   809,680x = 1,464,242,783,481
5. Step 5: Solve for x
   x = 1,464,242,783,481/809,680
6. Step 6: Final answer
   x = 1,808,421.58