Finding the Third Proportional to 289,760.25 and 443,250

Step by Step Solution

1. Step 1: Write the proportion equation
   289,760.25 : 443,250 = 443,250 : x
2. Step 2: Convert to fraction form
   289,760.25/443,250 = 443,250/x
3. Step 3: Cross multiply
   289,760.25x = 443,250 × 443,250
4. Step 4: Simplify right side
   289,760.25x = 196,470,562,500
5. Step 5: Solve for x
   x = 196,470,562,500/289,760.25
6. Step 6: Final answer
   x = 678,045.25