Finding the Third Proportional to 139,980 and 303,288

Step by Step Solution

1. Step 1: Write the proportion equation
   139,980 : 303,288 = 303,288 : x
2. Step 2: Convert to fraction form
   139,980/303,288 = 303,288/x
3. Step 3: Cross multiply
   139,980x = 303,288 × 303,288
4. Step 4: Simplify right side
   139,980x = 91,983,610,944
5. Step 5: Solve for x
   x = 91,983,610,944/139,980
6. Step 6: Final answer
   x = 657,119.67