Finding the Third Proportional to 218,109 and 470,587.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,109 : 470,587.50 = 470,587.50 : x
2. Step 2: Convert to fraction form
   218,109/470,587.50 = 470,587.50/x
3. Step 3: Cross multiply
   218,109x = 470,587.50 × 470,587.50
4. Step 4: Simplify right side
   218,109x = 221,452,595,156.25
5. Step 5: Solve for x
   x = 221,452,595,156.25/218,109
6. Step 6: Final answer
   x = 1,015,329.93