Finding the Third Proportional to 140,468 and 300,620

Step by Step Solution

1. Step 1: Write the proportion equation
   140,468 : 300,620 = 300,620 : x
2. Step 2: Convert to fraction form
   140,468/300,620 = 300,620/x
3. Step 3: Cross multiply
   140,468x = 300,620 × 300,620
4. Step 4: Simplify right side
   140,468x = 90,372,384,400
5. Step 5: Solve for x
   x = 90,372,384,400/140,468
6. Step 6: Final answer
   x = 643,366.35