Finding the Third Proportional to 155,530.50 and 320,874

Step by Step Solution

1. Step 1: Write the proportion equation
   155,530.50 : 320,874 = 320,874 : x
2. Step 2: Convert to fraction form
   155,530.50/320,874 = 320,874/x
3. Step 3: Cross multiply
   155,530.50x = 320,874 × 320,874
4. Step 4: Simplify right side
   155,530.50x = 102,960,123,876
5. Step 5: Solve for x
   x = 102,960,123,876/155,530.50
6. Step 6: Final answer
   x = 661,993.14