Finding the Fourth Proportional to 109.27, 164.01 and 61.21

Step by Step Solution

1. Step 1: Write the proportion equation
   109.27 : 164.01 = 61.21 : x
2. Step 2: Convert to fraction form
   109.27/164.01 = 61.21/x
3. Step 3: Cross multiply
   109.27x = 164.01 × 61.21
4. Step 4: Simplify right side
   109.27x = 10,039.05
5. Step 5: Solve for x
   x = 10,039.05/109.27
6. Step 6: Final answer
   x = 91.87