Finding the Fourth Proportional to 116.49, 160.83 and 72.89

Step by Step Solution

1. Step 1: Write the proportion equation
   116.49 : 160.83 = 72.89 : x
2. Step 2: Convert to fraction form
   116.49/160.83 = 72.89/x
3. Step 3: Cross multiply
   116.49x = 160.83 × 72.89
4. Step 4: Simplify right side
   116.49x = 11,722.09
5. Step 5: Solve for x
   x = 11,722.09/116.49
6. Step 6: Final answer
   x = 100.63