Finding the Fourth Proportional to 113.47, 157.25 and 111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   113.47 : 157.25 = 111.31 : x
2. Step 2: Convert to fraction form
   113.47/157.25 = 111.31/x
3. Step 3: Cross multiply
   113.47x = 157.25 × 111.31
4. Step 4: Simplify right side
   113.47x = 17,503.50
5. Step 5: Solve for x
   x = 17,503.50/113.47
6. Step 6: Final answer
   x = 154.26