Finding the Third Proportional to 215,790 and 470,190

Step by Step Solution

1. Step 1: Write the proportion equation
   215,790 : 470,190 = 470,190 : x
2. Step 2: Convert to fraction form
   215,790/470,190 = 470,190/x
3. Step 3: Cross multiply
   215,790x = 470,190 × 470,190
4. Step 4: Simplify right side
   215,790x = 221,078,636,100
5. Step 5: Solve for x
   x = 221,078,636,100/215,790
6. Step 6: Final answer
   x = 1,024,508.25