Finding the Fourth Proportional to 105.56, 158.34 and 69.47

Step by Step Solution

1. Step 1: Write the proportion equation
   105.56 : 158.34 = 69.47 : x
2. Step 2: Convert to fraction form
   105.56/158.34 = 69.47/x
3. Step 3: Cross multiply
   105.56x = 158.34 × 69.47
4. Step 4: Simplify right side
   105.56x = 10,998.74
5. Step 5: Solve for x
   x = 10,998.74/105.56
6. Step 6: Final answer
   x = 104.20