Finding the Fourth Proportional to 116.01, 173.78 and 72.71

Step by Step Solution

1. Step 1: Write the proportion equation
   116.01 : 173.78 = 72.71 : x
2. Step 2: Convert to fraction form
   116.01/173.78 = 72.71/x
3. Step 3: Cross multiply
   116.01x = 173.78 × 72.71
4. Step 4: Simplify right side
   116.01x = 12,634.31
5. Step 5: Solve for x
   x = 12,634.31/116.01
6. Step 6: Final answer
   x = 108.91