Finding the Fourth Proportional to 109.72, 164.69 and 60.96

Step by Step Solution

1. Step 1: Write the proportion equation
   109.72 : 164.69 = 60.96 : x
2. Step 2: Convert to fraction form
   109.72/164.69 = 60.96/x
3. Step 3: Cross multiply
   109.72x = 164.69 × 60.96
4. Step 4: Simplify right side
   109.72x = 10,039.50
5. Step 5: Solve for x
   x = 10,039.50/109.72
6. Step 6: Final answer
   x = 91.50