Finding the Fourth Proportional to 113.50, 170.43 and 59.42

Step by Step Solution

1. Step 1: Write the proportion equation
   113.50 : 170.43 = 59.42 : x
2. Step 2: Convert to fraction form
   113.50/170.43 = 59.42/x
3. Step 3: Cross multiply
   113.50x = 170.43 × 59.42
4. Step 4: Simplify right side
   113.50x = 10,126.95
5. Step 5: Solve for x
   x = 10,126.95/113.50
6. Step 6: Final answer
   x = 89.23