Finding the Fourth Proportional to 108.94, 150.28 and 72.09

Step by Step Solution

1. Step 1: Write the proportion equation
   108.94 : 150.28 = 72.09 : x
2. Step 2: Convert to fraction form
   108.94/150.28 = 72.09/x
3. Step 3: Cross multiply
   108.94x = 150.28 × 72.09
4. Step 4: Simplify right side
   108.94x = 10,833.69
5. Step 5: Solve for x
   x = 10,833.69/108.94
6. Step 6: Final answer
   x = 99.45