Finding the Fourth Proportional to 158.82, 219.15 and 93.31

Step by Step Solution

1. Step 1: Write the proportion equation
   158.82 : 219.15 = 93.31 : x
2. Step 2: Convert to fraction form
   158.82/219.15 = 93.31/x
3. Step 3: Cross multiply
   158.82x = 219.15 × 93.31
4. Step 4: Simplify right side
   158.82x = 20,448.89
5. Step 5: Solve for x
   x = 20,448.89/158.82
6. Step 6: Final answer
   x = 128.76