Finding the Fourth Proportional to 42.47, 58.55 and 27.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42.47 : 58.55 = 27.69 : x
2. Step 2: Convert to fraction form
   42.47/58.55 = 27.69/x
3. Step 3: Cross multiply
   42.47x = 58.55 × 27.69
4. Step 4: Simplify right side
   42.47x = 1,620.82
5. Step 5: Solve for x
   x = 1,620.82/42.47
6. Step 6: Final answer
   x = 38.17