Finding the Fourth Proportional to 146.72, 219.60 and 100.88

Step by Step Solution

1. Step 1: Write the proportion equation
   146.72 : 219.60 = 100.88 : x
2. Step 2: Convert to fraction form
   146.72/219.60 = 100.88/x
3. Step 3: Cross multiply
   146.72x = 219.60 × 100.88
4. Step 4: Simplify right side
   146.72x = 22,153.25
5. Step 5: Solve for x
   x = 22,153.25/146.72
6. Step 6: Final answer
   x = 150.99