Finding the Third Proportional to 98,220 and 215,016

Step by Step Solution

1. Step 1: Write the proportion equation
   98,220 : 215,016 = 215,016 : x
2. Step 2: Convert to fraction form
   98,220/215,016 = 215,016/x
3. Step 3: Cross multiply
   98,220x = 215,016 × 215,016
4. Step 4: Simplify right side
   98,220x = 46,231,880,256
5. Step 5: Solve for x
   x = 46,231,880,256/98,220
6. Step 6: Final answer
   x = 470,697.21