Finding the Third Proportional to 809,678 and 1,210,056

Step by Step Solution

1. Step 1: Write the proportion equation
   809,678 : 1,210,056 = 1,210,056 : x
2. Step 2: Convert to fraction form
   809,678/1,210,056 = 1,210,056/x
3. Step 3: Cross multiply
   809,678x = 1,210,056 × 1,210,056
4. Step 4: Simplify right side
   809,678x = 1,464,235,523,136
5. Step 5: Solve for x
   x = 1,464,235,523,136/809,678
6. Step 6: Final answer
   x = 1,808,417.08