Finding the Third Proportional to 300.94 and 445.78

Step by Step Solution

1. Step 1: Write the proportion equation
   300.94 : 445.78 = 445.78 : x
2. Step 2: Convert to fraction form
   300.94/445.78 = 445.78/x
3. Step 3: Cross multiply
   300.94x = 445.78 × 445.78
4. Step 4: Simplify right side
   300.94x = 198,720.92
5. Step 5: Solve for x
   x = 198,720.92/300.94
6. Step 6: Final answer
   x = 660.34