Finding the Fourth Proportional to 42.99, 59.02 and 39.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42.99 : 59.02 = 39.34 : x
2. Step 2: Convert to fraction form
   42.99/59.02 = 39.34/x
3. Step 3: Cross multiply
   42.99x = 59.02 × 39.34
4. Step 4: Simplify right side
   42.99x = 2,321.85
5. Step 5: Solve for x
   x = 2,321.85/42.99
6. Step 6: Final answer
   x = 54.01