Finding the Fourth Proportional to 151.82, 227.76 and 74.78

Step by Step Solution

1. Step 1: Write the proportion equation
   151.82 : 227.76 = 74.78 : x
2. Step 2: Convert to fraction form
   151.82/227.76 = 74.78/x
3. Step 3: Cross multiply
   151.82x = 227.76 × 74.78
4. Step 4: Simplify right side
   151.82x = 17,031.89
5. Step 5: Solve for x
   x = 17,031.89/151.82
6. Step 6: Final answer
   x = 112.18