Finding the Third Proportional to 298.88 and 448.31

Step by Step Solution

1. Step 1: Write the proportion equation
   298.88 : 448.31 = 448.31 : x
2. Step 2: Convert to fraction form
   298.88/448.31 = 448.31/x
3. Step 3: Cross multiply
   298.88x = 448.31 × 448.31
4. Step 4: Simplify right side
   298.88x = 200,984.10
5. Step 5: Solve for x
   x = 200,984.10/298.88
6. Step 6: Final answer
   x = 672.47