Finding the Fourth Proportional to 360.72, 541.12 and 100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   360.72 : 541.12 = 100.72 : x
2. Step 2: Convert to fraction form
   360.72/541.12 = 100.72/x
3. Step 3: Cross multiply
   360.72x = 541.12 × 100.72
4. Step 4: Simplify right side
   360.72x = 54,501.61
5. Step 5: Solve for x
   x = 54,501.61/360.72
6. Step 6: Final answer
   x = 151.09