Finding the Fourth Proportional to 109.50, 151.04 and 72.64

Step by Step Solution

1. Step 1: Write the proportion equation
   109.50 : 151.04 = 72.64 : x
2. Step 2: Convert to fraction form
   109.50/151.04 = 72.64/x
3. Step 3: Cross multiply
   109.50x = 151.04 × 72.64
4. Step 4: Simplify right side
   109.50x = 10,971.55
5. Step 5: Solve for x
   x = 10,971.55/109.50
6. Step 6: Final answer
   x = 100.20