Finding the Third Proportional to 155,955.50 and 328,208

Step by Step Solution

1. Step 1: Write the proportion equation
   155,955.50 : 328,208 = 328,208 : x
2. Step 2: Convert to fraction form
   155,955.50/328,208 = 328,208/x
3. Step 3: Cross multiply
   155,955.50x = 328,208 × 328,208
4. Step 4: Simplify right side
   155,955.50x = 107,720,491,264
5. Step 5: Solve for x
   x = 107,720,491,264/155,955.50
6. Step 6: Final answer
   x = 690,713.00