Finding the Fourth Proportional to 162.72, 224.49 and 100.56

Step by Step Solution

1. Step 1: Write the proportion equation
   162.72 : 224.49 = 100.56 : x
2. Step 2: Convert to fraction form
   162.72/224.49 = 100.56/x
3. Step 3: Cross multiply
   162.72x = 224.49 × 100.56
4. Step 4: Simplify right side
   162.72x = 22,574.71
5. Step 5: Solve for x
   x = 22,574.71/162.72
6. Step 6: Final answer
   x = 138.73