Finding the Fourth Proportional to 72.67, 109.69 and 72.67

Step by Step Solution

1. Step 1: Write the proportion equation
   72.67 : 109.69 = 72.67 : x
2. Step 2: Convert to fraction form
   72.67/109.69 = 72.67/x
3. Step 3: Cross multiply
   72.67x = 109.69 × 72.67
4. Step 4: Simplify right side
   72.67x = 7,971.54
5. Step 5: Solve for x
   x = 7,971.54/72.67
6. Step 6: Final answer
   x = 109.69