Finding the Fourth Proportional to 109.42, 151.01 and 72.68

Step by Step Solution

1. Step 1: Write the proportion equation
   109.42 : 151.01 = 72.68 : x
2. Step 2: Convert to fraction form
   109.42/151.01 = 72.68/x
3. Step 3: Cross multiply
   109.42x = 151.01 × 72.68
4. Step 4: Simplify right side
   109.42x = 10,975.41
5. Step 5: Solve for x
   x = 10,975.41/109.42
6. Step 6: Final answer
   x = 100.31