Finding the Third Proportional to 98,212 and 215,540

Step by Step Solution

1. Step 1: Write the proportion equation
   98,212 : 215,540 = 215,540 : x
2. Step 2: Convert to fraction form
   98,212/215,540 = 215,540/x
3. Step 3: Cross multiply
   98,212x = 215,540 × 215,540
4. Step 4: Simplify right side
   98,212x = 46,457,491,600
5. Step 5: Solve for x
   x = 46,457,491,600/98,212
6. Step 6: Final answer
   x = 473,032.74