Finding the Fourth Proportional to 42.16, 58.16 and 30.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42.16 : 58.16 = 30.50 : x
2. Step 2: Convert to fraction form
   42.16/58.16 = 30.50/x
3. Step 3: Cross multiply
   42.16x = 58.16 × 30.50
4. Step 4: Simplify right side
   42.16x = 1,773.88
5. Step 5: Solve for x
   x = 1,773.88/42.16
6. Step 6: Final answer
   x = 42.07