Finding the Fourth Proportional to 109.91, 151.69 and 66.27

Step by Step Solution

1. Step 1: Write the proportion equation
   109.91 : 151.69 = 66.27 : x
2. Step 2: Convert to fraction form
   109.91/151.69 = 66.27/x
3. Step 3: Cross multiply
   109.91x = 151.69 × 66.27
4. Step 4: Simplify right side
   109.91x = 10,052.50
5. Step 5: Solve for x
   x = 10,052.50/109.91
6. Step 6: Final answer
   x = 91.46