Finding the Fourth Proportional to 105.33, 157.71 and 64.69

Step by Step Solution

1. Step 1: Write the proportion equation
   105.33 : 157.71 = 64.69 : x
2. Step 2: Convert to fraction form
   105.33/157.71 = 64.69/x
3. Step 3: Cross multiply
   105.33x = 157.71 × 64.69
4. Step 4: Simplify right side
   105.33x = 10,202.26
5. Step 5: Solve for x
   x = 10,202.26/105.33
6. Step 6: Final answer
   x = 96.86