Finding the Fourth Proportional to 42.83, 59.08 and 30.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42.83 : 59.08 = 30.58 : x
2. Step 2: Convert to fraction form
   42.83/59.08 = 30.58/x
3. Step 3: Cross multiply
   42.83x = 59.08 × 30.58
4. Step 4: Simplify right side
   42.83x = 1,806.50
5. Step 5: Solve for x
   x = 1,806.50/42.83
6. Step 6: Final answer
   x = 42.18