Finding the Fourth Proportional to 42.97, 59.29 and 30.71

Step by Step Solution

1. Step 1: Write the proportion equation
   42.97 : 59.29 = 30.71 : x
2. Step 2: Convert to fraction form
   42.97/59.29 = 30.71/x
3. Step 3: Cross multiply
   42.97x = 59.29 × 30.71
4. Step 4: Simplify right side
   42.97x = 1,820.57
5. Step 5: Solve for x
   x = 1,820.57/42.97
6. Step 6: Final answer
   x = 42.37