Finding the Fourth Proportional to 42.99, 59.33 and 30.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42.99 : 59.33 = 30.74 : x
2. Step 2: Convert to fraction form
   42.99/59.33 = 30.74/x
3. Step 3: Cross multiply
   42.99x = 59.33 × 30.74
4. Step 4: Simplify right side
   42.99x = 1,823.35
5. Step 5: Solve for x
   x = 1,823.35/42.99
6. Step 6: Final answer
   x = 42.41