Finding the Third Proportional to 155,521.50 and 327,648

Step by Step Solution

1. Step 1: Write the proportion equation
   155,521.50 : 327,648 = 327,648 : x
2. Step 2: Convert to fraction form
   155,521.50/327,648 = 327,648/x
3. Step 3: Cross multiply
   155,521.50x = 327,648 × 327,648
4. Step 4: Simplify right side
   155,521.50x = 107,353,211,904
5. Step 5: Solve for x
   x = 107,353,211,904/155,521.50
6. Step 6: Final answer
   x = 690,278.91