Finding the Fourth Proportional to 113.38, 170.18 and 59.31

Step by Step Solution

1. Step 1: Write the proportion equation
   113.38 : 170.18 = 59.31 : x
2. Step 2: Convert to fraction form
   113.38/170.18 = 59.31/x
3. Step 3: Cross multiply
   113.38x = 170.18 × 59.31
4. Step 4: Simplify right side
   113.38x = 10,093.38
5. Step 5: Solve for x
   x = 10,093.38/113.38
6. Step 6: Final answer
   x = 89.02