Finding the Fourth Proportional to 105.51, 158.27 and 64.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105.51 : 158.27 = 64.88 : x
2. Step 2: Convert to fraction form
   105.51/158.27 = 64.88/x
3. Step 3: Cross multiply
   105.51x = 158.27 × 64.88
4. Step 4: Simplify right side
   105.51x = 10,268.56
5. Step 5: Solve for x
   x = 10,268.56/105.51
6. Step 6: Final answer
   x = 97.32