Finding the Fourth Proportional to 108.96, 150.42 and 72.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108.96 : 150.42 = 72.10 : x
2. Step 2: Convert to fraction form
   108.96/150.42 = 72.10/x
3. Step 3: Cross multiply
   108.96x = 150.42 × 72.10
4. Step 4: Simplify right side
   108.96x = 10,845.28
5. Step 5: Solve for x
   x = 10,845.28/108.96
6. Step 6: Final answer
   x = 99.53