Finding the Third Proportional to 139,164 and 300,556

Step by Step Solution

1. Step 1: Write the proportion equation
   139,164 : 300,556 = 300,556 : x
2. Step 2: Convert to fraction form
   139,164/300,556 = 300,556/x
3. Step 3: Cross multiply
   139,164x = 300,556 × 300,556
4. Step 4: Simplify right side
   139,164x = 90,333,909,136
5. Step 5: Solve for x
   x = 90,333,909,136/139,164
6. Step 6: Final answer
   x = 649,118.37