Finding the Third Proportional to 140,244 and 300,420

Step by Step Solution

1. Step 1: Write the proportion equation
   140,244 : 300,420 = 300,420 : x
2. Step 2: Convert to fraction form
   140,244/300,420 = 300,420/x
3. Step 3: Cross multiply
   140,244x = 300,420 × 300,420
4. Step 4: Simplify right side
   140,244x = 90,252,176,400
5. Step 5: Solve for x
   x = 90,252,176,400/140,244
6. Step 6: Final answer
   x = 643,536.81