Finding the Third Proportional to 158,418 and 329,895

Step by Step Solution

1. Step 1: Write the proportion equation
   158,418 : 329,895 = 329,895 : x
2. Step 2: Convert to fraction form
   158,418/329,895 = 329,895/x
3. Step 3: Cross multiply
   158,418x = 329,895 × 329,895
4. Step 4: Simplify right side
   158,418x = 108,830,711,025
5. Step 5: Solve for x
   x = 108,830,711,025/158,418
6. Step 6: Final answer
   x = 686,984.50