Finding the Third Proportional to 82,876 and 131,439

Step by Step Solution

1. Step 1: Write the proportion equation
   82,876 : 131,439 = 131,439 : x
2. Step 2: Convert to fraction form
   82,876/131,439 = 131,439/x
3. Step 3: Cross multiply
   82,876x = 131,439 × 131,439
4. Step 4: Simplify right side
   82,876x = 17,276,210,721
5. Step 5: Solve for x
   x = 17,276,210,721/82,876
6. Step 6: Final answer
   x = 208,458.55