Finding the Fourth Proportional to 111.32, 167.01 and 42.85

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 167.01 = 42.85 : x
2. Step 2: Convert to fraction form
   111.32/167.01 = 42.85/x
3. Step 3: Cross multiply
   111.32x = 167.01 × 42.85
4. Step 4: Simplify right side
   111.32x = 7,156.38
5. Step 5: Solve for x
   x = 7,156.38/111.32
6. Step 6: Final answer
   x = 64.29