Finding the Fourth Proportional to 109.28, 150.81 and 71.94

Step by Step Solution

1. Step 1: Write the proportion equation
   109.28 : 150.81 = 71.94 : x
2. Step 2: Convert to fraction form
   109.28/150.81 = 71.94/x
3. Step 3: Cross multiply
   109.28x = 150.81 × 71.94
4. Step 4: Simplify right side
   109.28x = 10,849.27
5. Step 5: Solve for x
   x = 10,849.27/109.28
6. Step 6: Final answer
   x = 99.28