Finding the Third Proportional to 289,942 and 443,525

Step by Step Solution

1. Step 1: Write the proportion equation
   289,942 : 443,525 = 443,525 : x
2. Step 2: Convert to fraction form
   289,942/443,525 = 443,525/x
3. Step 3: Cross multiply
   289,942x = 443,525 × 443,525
4. Step 4: Simplify right side
   289,942x = 196,714,425,625
5. Step 5: Solve for x
   x = 196,714,425,625/289,942
6. Step 6: Final answer
   x = 678,461.30