Finding the Fourth Proportional to 42.46, 58.61 and 30.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42.46 : 58.61 = 30.82 : x
2. Step 2: Convert to fraction form
   42.46/58.61 = 30.82/x
3. Step 3: Cross multiply
   42.46x = 58.61 × 30.82
4. Step 4: Simplify right side
   42.46x = 1,806.36
5. Step 5: Solve for x
   x = 1,806.36/42.46
6. Step 6: Final answer
   x = 42.54