Finding the Fourth Proportional to 151.81, 227.72 and 91.33

Step by Step Solution

1. Step 1: Write the proportion equation
   151.81 : 227.72 = 91.33 : x
2. Step 2: Convert to fraction form
   151.81/227.72 = 91.33/x
3. Step 3: Cross multiply
   151.81x = 227.72 × 91.33
4. Step 4: Simplify right side
   151.81x = 20,796.07
5. Step 5: Solve for x
   x = 20,796.07/151.81
6. Step 6: Final answer
   x = 136.99