Finding the Fourth Proportional to 112.53, 167.76 and 103.89

Step by Step Solution

1. Step 1: Write the proportion equation
   112.53 : 167.76 = 103.89 : x
2. Step 2: Convert to fraction form
   112.53/167.76 = 103.89/x
3. Step 3: Cross multiply
   112.53x = 167.76 × 103.89
4. Step 4: Simplify right side
   112.53x = 17,428.59
5. Step 5: Solve for x
   x = 17,428.59/112.53
6. Step 6: Final answer
   x = 154.88