Finding the Fourth Proportional to 72.37, 100.41 and 71.67

Step by Step Solution

1. Step 1: Write the proportion equation
   72.37 : 100.41 = 71.67 : x
2. Step 2: Convert to fraction form
   72.37/100.41 = 71.67/x
3. Step 3: Cross multiply
   72.37x = 100.41 × 71.67
4. Step 4: Simplify right side
   72.37x = 7,196.38
5. Step 5: Solve for x
   x = 7,196.38/72.37
6. Step 6: Final answer
   x = 99.44