Finding the Fourth Proportional to 42.77, 59.12 and 42.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42.77 : 59.12 = 42.42 : x
2. Step 2: Convert to fraction form
   42.77/59.12 = 42.42/x
3. Step 3: Cross multiply
   42.77x = 59.12 × 42.42
4. Step 4: Simplify right side
   42.77x = 2,508.04
5. Step 5: Solve for x
   x = 2,508.04/42.77
6. Step 6: Final answer
   x = 58.64