Finding the Third Proportional to 139,163 and 300,554

Step by Step Solution

1. Step 1: Write the proportion equation
   139,163 : 300,554 = 300,554 : x
2. Step 2: Convert to fraction form
   139,163/300,554 = 300,554/x
3. Step 3: Cross multiply
   139,163x = 300,554 × 300,554
4. Step 4: Simplify right side
   139,163x = 90,332,706,916
5. Step 5: Solve for x
   x = 90,332,706,916/139,163
6. Step 6: Final answer
   x = 649,114.40