Finding the Fourth Proportional to 111.25, 153.53 and 65.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111.25 : 153.53 = 65.25 : x
2. Step 2: Convert to fraction form
   111.25/153.53 = 65.25/x
3. Step 3: Cross multiply
   111.25x = 153.53 × 65.25
4. Step 4: Simplify right side
   111.25x = 10,017.83
5. Step 5: Solve for x
   x = 10,017.83/111.25
6. Step 6: Final answer
   x = 90.05