Finding the Third Proportional to 4.31 and 5.91

Step by Step Solution

1. Step 1: Write the proportion equation
   4.31 : 5.91 = 5.91 : x
2. Step 2: Convert to fraction form
   4.31/5.91 = 5.91/x
3. Step 3: Cross multiply
   4.31x = 5.91 × 5.91
4. Step 4: Simplify right side
   4.31x = 34.88
5. Step 5: Solve for x
   x = 34.88/4.31
6. Step 6: Final answer
   x = 8.09