Finding the Third Proportional to 82,602 and 131,289

Step by Step Solution

1. Step 1: Write the proportion equation
   82,602 : 131,289 = 131,289 : x
2. Step 2: Convert to fraction form
   82,602/131,289 = 131,289/x
3. Step 3: Cross multiply
   82,602x = 131,289 × 131,289
4. Step 4: Simplify right side
   82,602x = 17,236,801,521
5. Step 5: Solve for x
   x = 17,236,801,521/82,602
6. Step 6: Final answer
   x = 208,672.93