Finding the Fourth Proportional to 49.28, 68.06 and 42.72

Step by Step Solution

1. Step 1: Write the proportion equation
   49.28 : 68.06 = 42.72 : x
2. Step 2: Convert to fraction form
   49.28/68.06 = 42.72/x
3. Step 3: Cross multiply
   49.28x = 68.06 × 42.72
4. Step 4: Simplify right side
   49.28x = 2,907.52
5. Step 5: Solve for x
   x = 2,907.52/49.28
6. Step 6: Final answer
   x = 59.00