Finding the Third Proportional to 218,106 and 470,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,106 : 470,581.50 = 470,581.50 : x
2. Step 2: Convert to fraction form
   218,106/470,581.50 = 470,581.50/x
3. Step 3: Cross multiply
   218,106x = 470,581.50 × 470,581.50
4. Step 4: Simplify right side
   218,106x = 221,446,948,142.25
5. Step 5: Solve for x
   x = 221,446,948,142.25/218,106
6. Step 6: Final answer
   x = 1,015,318.00