Finding the Third Proportional to 34.31 and 54.42

Step by Step Solution

1. Step 1: Write the proportion equation
   34.31 : 54.42 = 54.42 : x
2. Step 2: Convert to fraction form
   34.31/54.42 = 54.42/x
3. Step 3: Cross multiply
   34.31x = 54.42 × 54.42
4. Step 4: Simplify right side
   34.31x = 2,961.74
5. Step 5: Solve for x
   x = 2,961.74/34.31
6. Step 6: Final answer
   x = 86.32