Finding the Third Proportional to 216,906 and 470,012

Step by Step Solution

1. Step 1: Write the proportion equation
   216,906 : 470,012 = 470,012 : x
2. Step 2: Convert to fraction form
   216,906/470,012 = 470,012/x
3. Step 3: Cross multiply
   216,906x = 470,012 × 470,012
4. Step 4: Simplify right side
   216,906x = 220,911,280,144
5. Step 5: Solve for x
   x = 220,911,280,144/216,906
6. Step 6: Final answer
   x = 1,018,465.51