Finding the Third Proportional to 139,560 and 300,018

Step by Step Solution

1. Step 1: Write the proportion equation
   139,560 : 300,018 = 300,018 : x
2. Step 2: Convert to fraction form
   139,560/300,018 = 300,018/x
3. Step 3: Cross multiply
   139,560x = 300,018 × 300,018
4. Step 4: Simplify right side
   139,560x = 90,010,800,324
5. Step 5: Solve for x
   x = 90,010,800,324/139,560
6. Step 6: Final answer
   x = 644,961.31