Finding the Third Proportional to 138,388.50 and 303,183

Step by Step Solution

1. Step 1: Write the proportion equation
   138,388.50 : 303,183 = 303,183 : x
2. Step 2: Convert to fraction form
   138,388.50/303,183 = 303,183/x
3. Step 3: Cross multiply
   138,388.50x = 303,183 × 303,183
4. Step 4: Simplify right side
   138,388.50x = 91,919,931,489
5. Step 5: Solve for x
   x = 91,919,931,489/138,388.50
6. Step 6: Final answer
   x = 664,216.55