Finding the Fourth Proportional to 108.81, 150.24 and 72.01

Step by Step Solution

1. Step 1: Write the proportion equation
   108.81 : 150.24 = 72.01 : x
2. Step 2: Convert to fraction form
   108.81/150.24 = 72.01/x
3. Step 3: Cross multiply
   108.81x = 150.24 × 72.01
4. Step 4: Simplify right side
   108.81x = 10,818.78
5. Step 5: Solve for x
   x = 10,818.78/108.81
6. Step 6: Final answer
   x = 99.43