Finding the Fourth Proportional to 149.69, 224.38 and 72.72

Step by Step Solution

1. Step 1: Write the proportion equation
   149.69 : 224.38 = 72.72 : x
2. Step 2: Convert to fraction form
   149.69/224.38 = 72.72/x
3. Step 3: Cross multiply
   149.69x = 224.38 × 72.72
4. Step 4: Simplify right side
   149.69x = 16,316.73
5. Step 5: Solve for x
   x = 16,316.73/149.69
6. Step 6: Final answer
   x = 109.01