Finding the Fourth Proportional to 158.82, 219.18 and 100.62

Step by Step Solution

1. Step 1: Write the proportion equation
   158.82 : 219.18 = 100.62 : x
2. Step 2: Convert to fraction form
   158.82/219.18 = 100.62/x
3. Step 3: Cross multiply
   158.82x = 219.18 × 100.62
4. Step 4: Simplify right side
   158.82x = 22,053.89
5. Step 5: Solve for x
   x = 22,053.89/158.82
6. Step 6: Final answer
   x = 138.86