Finding the Third Proportional to 155,547 and 320,766

Step by Step Solution

1. Step 1: Write the proportion equation
   155,547 : 320,766 = 320,766 : x
2. Step 2: Convert to fraction form
   155,547/320,766 = 320,766/x
3. Step 3: Cross multiply
   155,547x = 320,766 × 320,766
4. Step 4: Simplify right side
   155,547x = 102,890,826,756
5. Step 5: Solve for x
   x = 102,890,826,756/155,547
6. Step 6: Final answer
   x = 661,477.41