Finding the Fourth Proportional to 162.91, 224.72 and 100.62

Step by Step Solution

1. Step 1: Write the proportion equation
   162.91 : 224.72 = 100.62 : x
2. Step 2: Convert to fraction form
   162.91/224.72 = 100.62/x
3. Step 3: Cross multiply
   162.91x = 224.72 × 100.62
4. Step 4: Simplify right side
   162.91x = 22,612.04
5. Step 5: Solve for x
   x = 22,612.04/162.91
6. Step 6: Final answer
   x = 138.80