Finding the Third Proportional to 139,133 and 300,499

Step by Step Solution

1. Step 1: Write the proportion equation
   139,133 : 300,499 = 300,499 : x
2. Step 2: Convert to fraction form
   139,133/300,499 = 300,499/x
3. Step 3: Cross multiply
   139,133x = 300,499 × 300,499
4. Step 4: Simplify right side
   139,133x = 90,299,649,001
5. Step 5: Solve for x
   x = 90,299,649,001/139,133
6. Step 6: Final answer
   x = 649,016.76