Finding the Fourth Proportional to 162.86, 224.78 and 100.69

Step by Step Solution

1. Step 1: Write the proportion equation
   162.86 : 224.78 = 100.69 : x
2. Step 2: Convert to fraction form
   162.86/224.78 = 100.69/x
3. Step 3: Cross multiply
   162.86x = 224.78 × 100.69
4. Step 4: Simplify right side
   162.86x = 22,633.30
5. Step 5: Solve for x
   x = 22,633.30/162.86
6. Step 6: Final answer
   x = 138.97