Finding the Third Proportional to 139,215 and 303,270

Step by Step Solution

1. Step 1: Write the proportion equation
   139,215 : 303,270 = 303,270 : x
2. Step 2: Convert to fraction form
   139,215/303,270 = 303,270/x
3. Step 3: Cross multiply
   139,215x = 303,270 × 303,270
4. Step 4: Simplify right side
   139,215x = 91,972,692,900
5. Step 5: Solve for x
   x = 91,972,692,900/139,215
6. Step 6: Final answer
   x = 660,652.18