Finding the Fourth Proportional to 42.62, 58.76 and 28.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42.62 : 58.76 = 28.06 : x
2. Step 2: Convert to fraction form
   42.62/58.76 = 28.06/x
3. Step 3: Cross multiply
   42.62x = 58.76 × 28.06
4. Step 4: Simplify right side
   42.62x = 1,648.81
5. Step 5: Solve for x
   x = 1,648.81/42.62
6. Step 6: Final answer
   x = 38.69