Finding the Third Proportional to 140,284.50 and 300,669

Step by Step Solution

1. Step 1: Write the proportion equation
   140,284.50 : 300,669 = 300,669 : x
2. Step 2: Convert to fraction form
   140,284.50/300,669 = 300,669/x
3. Step 3: Cross multiply
   140,284.50x = 300,669 × 300,669
4. Step 4: Simplify right side
   140,284.50x = 90,401,847,561
5. Step 5: Solve for x
   x = 90,401,847,561/140,284.50
6. Step 6: Final answer
   x = 644,417.93