Finding the Third Proportional to 155,931 and 328,162

Step by Step Solution

1. Step 1: Write the proportion equation
   155,931 : 328,162 = 328,162 : x
2. Step 2: Convert to fraction form
   155,931/328,162 = 328,162/x
3. Step 3: Cross multiply
   155,931x = 328,162 × 328,162
4. Step 4: Simplify right side
   155,931x = 107,690,298,244
5. Step 5: Solve for x
   x = 107,690,298,244/155,931
6. Step 6: Final answer
   x = 690,627.89