Finding the Fourth Proportional to 162.18, 223.83 and 137.52

Step by Step Solution

1. Step 1: Write the proportion equation
   162.18 : 223.83 = 137.52 : x
2. Step 2: Convert to fraction form
   162.18/223.83 = 137.52/x
3. Step 3: Cross multiply
   162.18x = 223.83 × 137.52
4. Step 4: Simplify right side
   162.18x = 30,781.10
5. Step 5: Solve for x
   x = 30,781.10/162.18
6. Step 6: Final answer
   x = 189.80