Finding the Fourth Proportional to 111.12, 153.34 and 61.33

Step by Step Solution

1. Step 1: Write the proportion equation
   111.12 : 153.34 = 61.33 : x
2. Step 2: Convert to fraction form
   111.12/153.34 = 61.33/x
3. Step 3: Cross multiply
   111.12x = 153.34 × 61.33
4. Step 4: Simplify right side
   111.12x = 9,403.27
5. Step 5: Solve for x
   x = 9,403.27/111.12
6. Step 6: Final answer
   x = 84.63