Finding the Fourth Proportional to 116.72, 173.86 and 103.76

Step by Step Solution

1. Step 1: Write the proportion equation
   116.72 : 173.86 = 103.76 : x
2. Step 2: Convert to fraction form
   116.72/173.86 = 103.76/x
3. Step 3: Cross multiply
   116.72x = 173.86 × 103.76
4. Step 4: Simplify right side
   116.72x = 18,039.71
5. Step 5: Solve for x
   x = 18,039.71/116.72
6. Step 6: Final answer
   x = 154.56