Finding the Third Proportional to 139,297 and 300,760

Step by Step Solution

1. Step 1: Write the proportion equation
   139,297 : 300,760 = 300,760 : x
2. Step 2: Convert to fraction form
   139,297/300,760 = 300,760/x
3. Step 3: Cross multiply
   139,297x = 300,760 × 300,760
4. Step 4: Simplify right side
   139,297x = 90,456,577,600
5. Step 5: Solve for x
   x = 90,456,577,600/139,297
6. Step 6: Final answer
   x = 649,379.22