Finding the Fourth Proportional to 76.73, 105.98 and 72.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76.73 : 105.98 = 72.27 : x
2. Step 2: Convert to fraction form
   76.73/105.98 = 72.27/x
3. Step 3: Cross multiply
   76.73x = 105.98 × 72.27
4. Step 4: Simplify right side
   76.73x = 7,658.81
5. Step 5: Solve for x
   x = 7,658.81/76.73
6. Step 6: Final answer
   x = 99.82