Finding the Fourth Proportional to 143.89, 198.69 and 116.17

Step by Step Solution

1. Step 1: Write the proportion equation
   143.89 : 198.69 = 116.17 : x
2. Step 2: Convert to fraction form
   143.89/198.69 = 116.17/x
3. Step 3: Cross multiply
   143.89x = 198.69 × 116.17
4. Step 4: Simplify right side
   143.89x = 23,081.82
5. Step 5: Solve for x
   x = 23,081.82/143.89
6. Step 6: Final answer
   x = 160.41