Finding the Fourth Proportional to 58.39, 80.61 and 42.03

Step by Step Solution

1. Step 1: Write the proportion equation
   58.39 : 80.61 = 42.03 : x
2. Step 2: Convert to fraction form
   58.39/80.61 = 42.03/x
3. Step 3: Cross multiply
   58.39x = 80.61 × 42.03
4. Step 4: Simplify right side
   58.39x = 3,387.83
5. Step 5: Solve for x
   x = 3,387.83/58.39
6. Step 6: Final answer
   x = 58.03