Finding the Fourth Proportional to 100.72, 150.96 and 39.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100.72 : 150.96 = 39.82 : x
2. Step 2: Convert to fraction form
   100.72/150.96 = 39.82/x
3. Step 3: Cross multiply
   100.72x = 150.96 × 39.82
4. Step 4: Simplify right side
   100.72x = 6,010.86
5. Step 5: Solve for x
   x = 6,010.86/100.72
6. Step 6: Final answer
   x = 59.68