Finding the Fourth Proportional to 75.98, 104.86 and 42.79

Step by Step Solution

1. Step 1: Write the proportion equation
   75.98 : 104.86 = 42.79 : x
2. Step 2: Convert to fraction form
   75.98/104.86 = 42.79/x
3. Step 3: Cross multiply
   75.98x = 104.86 × 42.79
4. Step 4: Simplify right side
   75.98x = 4,487.42
5. Step 5: Solve for x
   x = 4,487.42/75.98
6. Step 6: Final answer
   x = 59.06