Finding the Fourth Proportional to 111.37, 153.69 and 62.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111.37 : 153.69 = 62.25 : x
2. Step 2: Convert to fraction form
   111.37/153.69 = 62.25/x
3. Step 3: Cross multiply
   111.37x = 153.69 × 62.25
4. Step 4: Simplify right side
   111.37x = 9,566.80
5. Step 5: Solve for x
   x = 9,566.80/111.37
6. Step 6: Final answer
   x = 85.90