Finding the Fourth Proportional to 111.88, 167.78 and 60.47

Step by Step Solution

1. Step 1: Write the proportion equation
   111.88 : 167.78 = 60.47 : x
2. Step 2: Convert to fraction form
   111.88/167.78 = 60.47/x
3. Step 3: Cross multiply
   111.88x = 167.78 × 60.47
4. Step 4: Simplify right side
   111.88x = 10,145.66
5. Step 5: Solve for x
   x = 10,145.66/111.88
6. Step 6: Final answer
   x = 90.68