Finding the Fourth Proportional to 100.56, 150.96 and 100.12

Step by Step Solution

1. Step 1: Write the proportion equation
   100.56 : 150.96 = 100.12 : x
2. Step 2: Convert to fraction form
   100.56/150.96 = 100.12/x
3. Step 3: Cross multiply
   100.56x = 150.96 × 100.12
4. Step 4: Simplify right side
   100.56x = 15,114.12
5. Step 5: Solve for x
   x = 15,114.12/100.56
6. Step 6: Final answer
   x = 150.30