Finding the Third Proportional to 189,908 and 300,718

Step by Step Solution

1. Step 1: Write the proportion equation
   189,908 : 300,718 = 300,718 : x
2. Step 2: Convert to fraction form
   189,908/300,718 = 300,718/x
3. Step 3: Cross multiply
   189,908x = 300,718 × 300,718
4. Step 4: Simplify right side
   189,908x = 90,431,315,524
5. Step 5: Solve for x
   x = 90,431,315,524/189,908
6. Step 6: Final answer
   x = 476,184.87