Finding the Fourth Proportional to 100.69, 151.01 and 28.55

Step by Step Solution

1. Step 1: Write the proportion equation
   100.69 : 151.01 = 28.55 : x
2. Step 2: Convert to fraction form
   100.69/151.01 = 28.55/x
3. Step 3: Cross multiply
   100.69x = 151.01 × 28.55
4. Step 4: Simplify right side
   100.69x = 4,311.19
5. Step 5: Solve for x
   x = 4,311.19/100.69
6. Step 6: Final answer
   x = 42.82