Finding the Fourth Proportional to 111.32, 167.28 and 59.99

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 167.28 = 59.99 : x
2. Step 2: Convert to fraction form
   111.32/167.28 = 59.99/x
3. Step 3: Cross multiply
   111.32x = 167.28 × 59.99
4. Step 4: Simplify right side
   111.32x = 10,034.29
5. Step 5: Solve for x
   x = 10,034.29/111.32
6. Step 6: Final answer
   x = 90.14