Finding the Fourth Proportional to 146.50, 219.30 and 100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   146.50 : 219.30 = 100.72 : x
2. Step 2: Convert to fraction form
   146.50/219.30 = 100.72/x
3. Step 3: Cross multiply
   146.50x = 219.30 × 100.72
4. Step 4: Simplify right side
   146.50x = 22,087.90
5. Step 5: Solve for x
   x = 22,087.90/146.50
6. Step 6: Final answer
   x = 150.77