Finding the Fourth Proportional to 191.82, 264.72 and 117.18

Step by Step Solution

1. Step 1: Write the proportion equation
   191.82 : 264.72 = 117.18 : x
2. Step 2: Convert to fraction form
   191.82/264.72 = 117.18/x
3. Step 3: Cross multiply
   191.82x = 264.72 × 117.18
4. Step 4: Simplify right side
   191.82x = 31,019.89
5. Step 5: Solve for x
   x = 31,019.89/191.82
6. Step 6: Final answer
   x = 161.71