Finding the Fourth Proportional to 100.47, 150.69 and 28.31

Step by Step Solution

1. Step 1: Write the proportion equation
   100.47 : 150.69 = 28.31 : x
2. Step 2: Convert to fraction form
   100.47/150.69 = 28.31/x
3. Step 3: Cross multiply
   100.47x = 150.69 × 28.31
4. Step 4: Simplify right side
   100.47x = 4,266.36
5. Step 5: Solve for x
   x = 4,266.36/100.47
6. Step 6: Final answer
   x = 42.46