Finding the Fourth Proportional to 105.18, 156.59 and 104.67

Step by Step Solution

1. Step 1: Write the proportion equation
   105.18 : 156.59 = 104.67 : x
2. Step 2: Convert to fraction form
   105.18/156.59 = 104.67/x
3. Step 3: Cross multiply
   105.18x = 156.59 × 104.67
4. Step 4: Simplify right side
   105.18x = 16,389.75
5. Step 5: Solve for x
   x = 16,389.75/105.18
6. Step 6: Final answer
   x = 155.83