Finding the Fourth Proportional to 111.36, 166.72 and 59.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111.36 : 166.72 = 59.84 : x
2. Step 2: Convert to fraction form
   111.36/166.72 = 59.84/x
3. Step 3: Cross multiply
   111.36x = 166.72 × 59.84
4. Step 4: Simplify right side
   111.36x = 9,976.52
5. Step 5: Solve for x
   x = 9,976.52/111.36
6. Step 6: Final answer
   x = 89.59