Finding the Third Proportional to 155,532 and 326,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,532 : 326,728.50 = 326,728.50 : x
2. Step 2: Convert to fraction form
   155,532/326,728.50 = 326,728.50/x
3. Step 3: Cross multiply
   155,532x = 326,728.50 × 326,728.50
4. Step 4: Simplify right side
   155,532x = 106,751,512,712.25
5. Step 5: Solve for x
   x = 106,751,512,712.25/155,532
6. Step 6: Final answer
   x = 686,363.66