Finding the Third Proportional to 34.17 and 54.58

Step by Step Solution

1. Step 1: Write the proportion equation
   34.17 : 54.58 = 54.58 : x
2. Step 2: Convert to fraction form
   34.17/54.58 = 54.58/x
3. Step 3: Cross multiply
   34.17x = 54.58 × 54.58
4. Step 4: Simplify right side
   34.17x = 2,978.98
5. Step 5: Solve for x
   x = 2,978.98/34.17
6. Step 6: Final answer
   x = 87.18