Finding the Fourth Proportional to 111.32, 167.06 and 102.06

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 167.06 = 102.06 : x
2. Step 2: Convert to fraction form
   111.32/167.06 = 102.06/x
3. Step 3: Cross multiply
   111.32x = 167.06 × 102.06
4. Step 4: Simplify right side
   111.32x = 17,050.40
5. Step 5: Solve for x
   x = 17,050.40/111.32
6. Step 6: Final answer
   x = 153.16