Finding the Fourth Proportional to 105.43, 158.16 and 64.37

Step by Step Solution

1. Step 1: Write the proportion equation
   105.43 : 158.16 = 64.37 : x
2. Step 2: Convert to fraction form
   105.43/158.16 = 64.37/x
3. Step 3: Cross multiply
   105.43x = 158.16 × 64.37
4. Step 4: Simplify right side
   105.43x = 10,180.76
5. Step 5: Solve for x
   x = 10,180.76/105.43
6. Step 6: Final answer
   x = 96.56