Finding the Third Proportional to 2.17 and 5.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2.17 : 5.71 = 5.71 : x
2. Step 2: Convert to fraction form
   2.17/5.71 = 5.71/x
3. Step 3: Cross multiply
   2.17x = 5.71 × 5.71
4. Step 4: Simplify right side
   2.17x = 32.57
5. Step 5: Solve for x
   x = 32.57/2.17
6. Step 6: Final answer
   x = 15.03