Finding the Third Proportional to 289,602 and 443,019.38

Step by Step Solution

1. Step 1: Write the proportion equation
   289,602 : 443,019.38 = 443,019.38 : x
2. Step 2: Convert to fraction form
   289,602/443,019.38 = 443,019.38/x
3. Step 3: Cross multiply
   289,602x = 443,019.38 × 443,019.38
4. Step 4: Simplify right side
   289,602x = 196,266,166,625.39
5. Step 5: Solve for x
   x = 196,266,166,625.39/289,602
6. Step 6: Final answer
   x = 677,709.98