Finding the Fourth Proportional to 42.99, 59.33 and 34.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42.99 : 59.33 = 34.78 : x
2. Step 2: Convert to fraction form
   42.99/59.33 = 34.78/x
3. Step 3: Cross multiply
   42.99x = 59.33 × 34.78
4. Step 4: Simplify right side
   42.99x = 2,063.44
5. Step 5: Solve for x
   x = 2,063.44/42.99
6. Step 6: Final answer
   x = 48.00