Finding the Third Proportional to 155,469 and 329,621

Step by Step Solution

1. Step 1: Write the proportion equation
   155,469 : 329,621 = 329,621 : x
2. Step 2: Convert to fraction form
   155,469/329,621 = 329,621/x
3. Step 3: Cross multiply
   155,469x = 329,621 × 329,621
4. Step 4: Simplify right side
   155,469x = 108,650,003,641
5. Step 5: Solve for x
   x = 108,650,003,641/155,469
6. Step 6: Final answer
   x = 698,853.17