Finding the Third Proportional to 98,640 and 215,732

Step by Step Solution

1. Step 1: Write the proportion equation
   98,640 : 215,732 = 215,732 : x
2. Step 2: Convert to fraction form
   98,640/215,732 = 215,732/x
3. Step 3: Cross multiply
   98,640x = 215,732 × 215,732
4. Step 4: Simplify right side
   98,640x = 46,540,295,824
5. Step 5: Solve for x
   x = 46,540,295,824/98,640
6. Step 6: Final answer
   x = 471,819.71