Finding the Third Proportional to 140,200 and 300,080

Step by Step Solution

1. Step 1: Write the proportion equation
   140,200 : 300,080 = 300,080 : x
2. Step 2: Convert to fraction form
   140,200/300,080 = 300,080/x
3. Step 3: Cross multiply
   140,200x = 300,080 × 300,080
4. Step 4: Simplify right side
   140,200x = 90,048,006,400
5. Step 5: Solve for x
   x = 90,048,006,400/140,200
6. Step 6: Final answer
   x = 642,282.50