Finding the Third Proportional to 328,738 and 445,470

Step by Step Solution

1. Step 1: Write the proportion equation
   328,738 : 445,470 = 445,470 : x
2. Step 2: Convert to fraction form
   328,738/445,470 = 445,470/x
3. Step 3: Cross multiply
   328,738x = 445,470 × 445,470
4. Step 4: Simplify right side
   328,738x = 198,443,520,900
5. Step 5: Solve for x
   x = 198,443,520,900/328,738
6. Step 6: Final answer
   x = 603,652.52