Finding the Third Proportional to 809,607 and 1,776,678

Step by Step Solution

1. Step 1: Write the proportion equation
   809,607 : 1,776,678 = 1,776,678 : x
2. Step 2: Convert to fraction form
   809,607/1,776,678 = 1,776,678/x
3. Step 3: Cross multiply
   809,607x = 1,776,678 × 1,776,678
4. Step 4: Simplify right side
   809,607x = 3,156,584,715,684
5. Step 5: Solve for x
   x = 3,156,584,715,684/809,607
6. Step 6: Final answer
   x = 3,898,909.86