Finding the Third Proportional to 139,288.50 and 300,744

Step by Step Solution

1. Step 1: Write the proportion equation
   139,288.50 : 300,744 = 300,744 : x
2. Step 2: Convert to fraction form
   139,288.50/300,744 = 300,744/x
3. Step 3: Cross multiply
   139,288.50x = 300,744 × 300,744
4. Step 4: Simplify right side
   139,288.50x = 90,446,953,536
5. Step 5: Solve for x
   x = 90,446,953,536/139,288.50
6. Step 6: Final answer
   x = 649,349.76