Finding the Third Proportional to 82,422 and 168,390

Step by Step Solution

1. Step 1: Write the proportion equation
   82,422 : 168,390 = 168,390 : x
2. Step 2: Convert to fraction form
   82,422/168,390 = 168,390/x
3. Step 3: Cross multiply
   82,422x = 168,390 × 168,390
4. Step 4: Simplify right side
   82,422x = 28,355,192,100
5. Step 5: Solve for x
   x = 28,355,192,100/82,422
6. Step 6: Final answer
   x = 344,024.56