Finding the Third Proportional to 328,743 and 445,486.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,743 : 445,486.50 = 445,486.50 : x
2. Step 2: Convert to fraction form
   328,743/445,486.50 = 445,486.50/x
3. Step 3: Cross multiply
   328,743x = 445,486.50 × 445,486.50
4. Step 4: Simplify right side
   328,743x = 198,458,221,682.25
5. Step 5: Solve for x
   x = 198,458,221,682.25/328,743
6. Step 6: Final answer
   x = 603,688.05