Finding the Fourth Proportional to 111.99, 167.23 and 90.35

Step by Step Solution

1. Step 1: Write the proportion equation
   111.99 : 167.23 = 90.35 : x
2. Step 2: Convert to fraction form
   111.99/167.23 = 90.35/x
3. Step 3: Cross multiply
   111.99x = 167.23 × 90.35
4. Step 4: Simplify right side
   111.99x = 15,109.23
5. Step 5: Solve for x
   x = 15,109.23/111.99
6. Step 6: Final answer
   x = 134.92