Finding the Fourth Proportional to 116.15, 173.88 and 72.69

Step by Step Solution

1. Step 1: Write the proportion equation
   116.15 : 173.88 = 72.69 : x
2. Step 2: Convert to fraction form
   116.15/173.88 = 72.69/x
3. Step 3: Cross multiply
   116.15x = 173.88 × 72.69
4. Step 4: Simplify right side
   116.15x = 12,639.34
5. Step 5: Solve for x
   x = 12,639.34/116.15
6. Step 6: Final answer
   x = 108.82