Finding the Third Proportional to 161,424 and 329,404

Step by Step Solution

1. Step 1: Write the proportion equation
   161,424 : 329,404 = 329,404 : x
2. Step 2: Convert to fraction form
   161,424/329,404 = 329,404/x
3. Step 3: Cross multiply
   161,424x = 329,404 × 329,404
4. Step 4: Simplify right side
   161,424x = 108,506,995,216
5. Step 5: Solve for x
   x = 108,506,995,216/161,424
6. Step 6: Final answer
   x = 672,186.26