Finding the Third Proportional to 139,156 and 300,540

Step by Step Solution

1. Step 1: Write the proportion equation
   139,156 : 300,540 = 300,540 : x
2. Step 2: Convert to fraction form
   139,156/300,540 = 300,540/x
3. Step 3: Cross multiply
   139,156x = 300,540 × 300,540
4. Step 4: Simplify right side
   139,156x = 90,324,291,600
5. Step 5: Solve for x
   x = 90,324,291,600/139,156
6. Step 6: Final answer
   x = 649,086.58