Finding the Fourth Proportional to 158.59, 218.69 and 105.32

Step by Step Solution

1. Step 1: Write the proportion equation
   158.59 : 218.69 = 105.32 : x
2. Step 2: Convert to fraction form
   158.59/218.69 = 105.32/x
3. Step 3: Cross multiply
   158.59x = 218.69 × 105.32
4. Step 4: Simplify right side
   158.59x = 23,031.34
5. Step 5: Solve for x
   x = 23,031.34/158.59
6. Step 6: Final answer
   x = 145.23