Finding the Third Proportional to 289,747.13 and 443,233.69

Step by Step Solution

1. Step 1: Write the proportion equation
   289,747.13 : 443,233.69 = 443,233.69 : x
2. Step 2: Convert to fraction form
   289,747.13/443,233.69 = 443,233.69/x
3. Step 3: Cross multiply
   289,747.13x = 443,233.69 × 443,233.69
4. Step 4: Simplify right side
   289,747.13x = 196,456,101,734.85
5. Step 5: Solve for x
   x = 196,456,101,734.85/289,747.13
6. Step 6: Final answer
   x = 678,026.06