Finding the Fourth Proportional to 100.42, 150.63 and 28.29

Step by Step Solution

1. Step 1: Write the proportion equation
   100.42 : 150.63 = 28.29 : x
2. Step 2: Convert to fraction form
   100.42/150.63 = 28.29/x
3. Step 3: Cross multiply
   100.42x = 150.63 × 28.29
4. Step 4: Simplify right side
   100.42x = 4,261.32
5. Step 5: Solve for x
   x = 4,261.32/100.42
6. Step 6: Final answer
   x = 42.44