Finding the Third Proportional to 82,820 and 131,206

Step by Step Solution

1. Step 1: Write the proportion equation
   82,820 : 131,206 = 131,206 : x
2. Step 2: Convert to fraction form
   82,820/131,206 = 131,206/x
3. Step 3: Cross multiply
   82,820x = 131,206 × 131,206
4. Step 4: Simplify right side
   82,820x = 17,215,014,436
5. Step 5: Solve for x
   x = 17,215,014,436/82,820
6. Step 6: Final answer
   x = 207,860.59