Finding the Third Proportional to 16.72 and 36.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16.72 : 36.30 = 36.30 : x
2. Step 2: Convert to fraction form
   16.72/36.30 = 36.30/x
3. Step 3: Cross multiply
   16.72x = 36.30 × 36.30
4. Step 4: Simplify right side
   16.72x = 1,317.46
5. Step 5: Solve for x
   x = 1,317.46/16.72
6. Step 6: Final answer
   x = 78.80