Finding the Third Proportional to 162,720 and 215,976

Step by Step Solution

1. Step 1: Write the proportion equation
   162,720 : 215,976 = 215,976 : x
2. Step 2: Convert to fraction form
   162,720/215,976 = 215,976/x
3. Step 3: Cross multiply
   162,720x = 215,976 × 215,976
4. Step 4: Simplify right side
   162,720x = 46,645,632,576
5. Step 5: Solve for x
   x = 46,645,632,576/162,720
6. Step 6: Final answer
   x = 286,661.95