Finding the Fourth Proportional to 109.64, 151.34 and 86.01

Step by Step Solution

1. Step 1: Write the proportion equation
   109.64 : 151.34 = 86.01 : x
2. Step 2: Convert to fraction form
   109.64/151.34 = 86.01/x
3. Step 3: Cross multiply
   109.64x = 151.34 × 86.01
4. Step 4: Simplify right side
   109.64x = 13,016.32
5. Step 5: Solve for x
   x = 13,016.32/109.64
6. Step 6: Final answer
   x = 118.72