Finding the Fourth Proportional to 187.55, 258.71 and 117.59

Step by Step Solution

1. Step 1: Write the proportion equation
   187.55 : 258.71 = 117.59 : x
2. Step 2: Convert to fraction form
   187.55/258.71 = 117.59/x
3. Step 3: Cross multiply
   187.55x = 258.71 × 117.59
4. Step 4: Simplify right side
   187.55x = 30,419.83
5. Step 5: Solve for x
   x = 30,419.83/187.55
6. Step 6: Final answer
   x = 162.20