Finding the Third Proportional to 100.69 and 218.03

Step by Step Solution

1. Step 1: Write the proportion equation
   100.69 : 218.03 = 218.03 : x
2. Step 2: Convert to fraction form
   100.69/218.03 = 218.03/x
3. Step 3: Cross multiply
   100.69x = 218.03 × 218.03
4. Step 4: Simplify right side
   100.69x = 47,537.63
5. Step 5: Solve for x
   x = 47,537.63/100.69
6. Step 6: Final answer
   x = 472.13