Finding the Fourth Proportional to 152.72, 228.72 and 101.28

Step by Step Solution

1. Step 1: Write the proportion equation
   152.72 : 228.72 = 101.28 : x
2. Step 2: Convert to fraction form
   152.72/228.72 = 101.28/x
3. Step 3: Cross multiply
   152.72x = 228.72 × 101.28
4. Step 4: Simplify right side
   152.72x = 23,164.76
5. Step 5: Solve for x
   x = 23,164.76/152.72
6. Step 6: Final answer
   x = 151.68