Finding the Third Proportional to 87,216 and 134,256

Step by Step Solution

1. Step 1: Write the proportion equation
   87,216 : 134,256 = 134,256 : x
2. Step 2: Convert to fraction form
   87,216/134,256 = 134,256/x
3. Step 3: Cross multiply
   87,216x = 134,256 × 134,256
4. Step 4: Simplify right side
   87,216x = 18,024,673,536
5. Step 5: Solve for x
   x = 18,024,673,536/87,216
6. Step 6: Final answer
   x = 206,667.05