Finding the Third Proportional to 164,325.50 and 336,439

Step by Step Solution

1. Step 1: Write the proportion equation
   164,325.50 : 336,439 = 336,439 : x
2. Step 2: Convert to fraction form
   164,325.50/336,439 = 336,439/x
3. Step 3: Cross multiply
   164,325.50x = 336,439 × 336,439
4. Step 4: Simplify right side
   164,325.50x = 113,191,200,721
5. Step 5: Solve for x
   x = 113,191,200,721/164,325.50
6. Step 6: Final answer
   x = 688,823.10