Finding the Third Proportional to 140,322 and 300,570

Step by Step Solution

1. Step 1: Write the proportion equation
   140,322 : 300,570 = 300,570 : x
2. Step 2: Convert to fraction form
   140,322/300,570 = 300,570/x
3. Step 3: Cross multiply
   140,322x = 300,570 × 300,570
4. Step 4: Simplify right side
   140,322x = 90,342,324,900
5. Step 5: Solve for x
   x = 90,342,324,900/140,322
6. Step 6: Final answer
   x = 643,821.53