Finding the Third Proportional to 164,328 and 336,443

Step by Step Solution

1. Step 1: Write the proportion equation
   164,328 : 336,443 = 336,443 : x
2. Step 2: Convert to fraction form
   164,328/336,443 = 336,443/x
3. Step 3: Cross multiply
   164,328x = 336,443 × 336,443
4. Step 4: Simplify right side
   164,328x = 113,193,892,249
5. Step 5: Solve for x
   x = 113,193,892,249/164,328
6. Step 6: Final answer
   x = 688,829.00