Finding the Fourth Proportional to 146.33, 219.60 and 100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   146.33 : 219.60 = 100.72 : x
2. Step 2: Convert to fraction form
   146.33/219.60 = 100.72/x
3. Step 3: Cross multiply
   146.33x = 219.60 × 100.72
4. Step 4: Simplify right side
   146.33x = 22,117.61
5. Step 5: Solve for x
   x = 22,117.61/146.33
6. Step 6: Final answer
   x = 151.15