Finding the Third Proportional to 140,392 and 300,080

Step by Step Solution

1. Step 1: Write the proportion equation
   140,392 : 300,080 = 300,080 : x
2. Step 2: Convert to fraction form
   140,392/300,080 = 300,080/x
3. Step 3: Cross multiply
   140,392x = 300,080 × 300,080
4. Step 4: Simplify right side
   140,392x = 90,048,006,400
5. Step 5: Solve for x
   x = 90,048,006,400/140,392
6. Step 6: Final answer
   x = 641,404.11