Finding the Fourth Proportional to 151.78, 227.78 and 59.31

Step by Step Solution

1. Step 1: Write the proportion equation
   151.78 : 227.78 = 59.31 : x
2. Step 2: Convert to fraction form
   151.78/227.78 = 59.31/x
3. Step 3: Cross multiply
   151.78x = 227.78 × 59.31
4. Step 4: Simplify right side
   151.78x = 13,509.63
5. Step 5: Solve for x
   x = 13,509.63/151.78
6. Step 6: Final answer
   x = 89.01