Finding the Fourth Proportional to 100.72, 151.02 and 70.28

Step by Step Solution

1. Step 1: Write the proportion equation
   100.72 : 151.02 = 70.28 : x
2. Step 2: Convert to fraction form
   100.72/151.02 = 70.28/x
3. Step 3: Cross multiply
   100.72x = 151.02 × 70.28
4. Step 4: Simplify right side
   100.72x = 10,613.69
5. Step 5: Solve for x
   x = 10,613.69/100.72
6. Step 6: Final answer
   x = 105.38