Finding the Fourth Proportional to 271.69, 407.72 and 100.69

Step by Step Solution

1. Step 1: Write the proportion equation
   271.69 : 407.72 = 100.69 : x
2. Step 2: Convert to fraction form
   271.69/407.72 = 100.69/x
3. Step 3: Cross multiply
   271.69x = 407.72 × 100.69
4. Step 4: Simplify right side
   271.69x = 41,051.80
5. Step 5: Solve for x
   x = 41,051.80/271.69
6. Step 6: Final answer
   x = 151.10