Finding the Fourth Proportional to 39.98, 59.89 and 34.17

Step by Step Solution

1. Step 1: Write the proportion equation
   39.98 : 59.89 = 34.17 : x
2. Step 2: Convert to fraction form
   39.98/59.89 = 34.17/x
3. Step 3: Cross multiply
   39.98x = 59.89 × 34.17
4. Step 4: Simplify right side
   39.98x = 2,046.42
5. Step 5: Solve for x
   x = 2,046.42/39.98
6. Step 6: Final answer
   x = 51.18