Finding the Fourth Proportional to 105.50, 157.52 and 104.74

Step by Step Solution

1. Step 1: Write the proportion equation
   105.50 : 157.52 = 104.74 : x
2. Step 2: Convert to fraction form
   105.50/157.52 = 104.74/x
3. Step 3: Cross multiply
   105.50x = 157.52 × 104.74
4. Step 4: Simplify right side
   105.50x = 16,499.10
5. Step 5: Solve for x
   x = 16,499.10/105.50
6. Step 6: Final answer
   x = 156.39