Finding the Third Proportional to 108,390 and 170,256

Step by Step Solution

1. Step 1: Write the proportion equation
   108,390 : 170,256 = 170,256 : x
2. Step 2: Convert to fraction form
   108,390/170,256 = 170,256/x
3. Step 3: Cross multiply
   108,390x = 170,256 × 170,256
4. Step 4: Simplify right side
   108,390x = 28,987,105,536
5. Step 5: Solve for x
   x = 28,987,105,536/108,390
6. Step 6: Final answer
   x = 267,433.39