Finding the Third Proportional to 289,608 and 443,028

Step by Step Solution

1. Step 1: Write the proportion equation
   289,608 : 443,028 = 443,028 : x
2. Step 2: Convert to fraction form
   289,608/443,028 = 443,028/x
3. Step 3: Cross multiply
   289,608x = 443,028 × 443,028
4. Step 4: Simplify right side
   289,608x = 196,273,808,784
5. Step 5: Solve for x
   x = 196,273,808,784/289,608
6. Step 6: Final answer
   x = 677,722.33