Finding the Third Proportional to 218,308 and 470,200

Step by Step Solution

1. Step 1: Write the proportion equation
   218,308 : 470,200 = 470,200 : x
2. Step 2: Convert to fraction form
   218,308/470,200 = 470,200/x
3. Step 3: Cross multiply
   218,308x = 470,200 × 470,200
4. Step 4: Simplify right side
   218,308x = 221,088,040,000
5. Step 5: Solve for x
   x = 221,088,040,000/218,308
6. Step 6: Final answer
   x = 1,012,734.49