Finding the Third Proportional to 158,173 and 329,469

Step by Step Solution

1. Step 1: Write the proportion equation
   158,173 : 329,469 = 329,469 : x
2. Step 2: Convert to fraction form
   158,173/329,469 = 329,469/x
3. Step 3: Cross multiply
   158,173x = 329,469 × 329,469
4. Step 4: Simplify right side
   158,173x = 108,549,821,961
5. Step 5: Solve for x
   x = 108,549,821,961/158,173
6. Step 6: Final answer
   x = 686,272.76