Finding the Fourth Proportional to 111.32, 166.88 and 59.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 166.88 = 59.98 : x
2. Step 2: Convert to fraction form
   111.32/166.88 = 59.98/x
3. Step 3: Cross multiply
   111.32x = 166.88 × 59.98
4. Step 4: Simplify right side
   111.32x = 10,009.46
5. Step 5: Solve for x
   x = 10,009.46/111.32
6. Step 6: Final answer
   x = 89.92