Finding the Third Proportional to 71,356 and 109,721

Step by Step Solution

1. Step 1: Write the proportion equation
   71,356 : 109,721 = 109,721 : x
2. Step 2: Convert to fraction form
   71,356/109,721 = 109,721/x
3. Step 3: Cross multiply
   71,356x = 109,721 × 109,721
4. Step 4: Simplify right side
   71,356x = 12,038,697,841
5. Step 5: Solve for x
   x = 12,038,697,841/71,356
6. Step 6: Final answer
   x = 168,713.18