Finding the Third Proportional to 82,818 and 129,147

Step by Step Solution

1. Step 1: Write the proportion equation
   82,818 : 129,147 = 129,147 : x
2. Step 2: Convert to fraction form
   82,818/129,147 = 129,147/x
3. Step 3: Cross multiply
   82,818x = 129,147 × 129,147
4. Step 4: Simplify right side
   82,818x = 16,678,947,609
5. Step 5: Solve for x
   x = 16,678,947,609/82,818
6. Step 6: Final answer
   x = 201,392.78