Finding the Third Proportional to 218.88 and 443.94

Step by Step Solution

1. Step 1: Write the proportion equation
   218.88 : 443.94 = 443.94 : x
2. Step 2: Convert to fraction form
   218.88/443.94 = 443.94/x
3. Step 3: Cross multiply
   218.88x = 443.94 × 443.94
4. Step 4: Simplify right side
   218.88x = 197,080.50
5. Step 5: Solve for x
   x = 197,080.50/218.88
6. Step 6: Final answer
   x = 900.42