Finding the Fourth Proportional to 71.05, 105.89 and 69.69

Step by Step Solution

1. Step 1: Write the proportion equation
   71.05 : 105.89 = 69.69 : x
2. Step 2: Convert to fraction form
   71.05/105.89 = 69.69/x
3. Step 3: Cross multiply
   71.05x = 105.89 × 69.69
4. Step 4: Simplify right side
   71.05x = 7,379.47
5. Step 5: Solve for x
   x = 7,379.47/71.05
6. Step 6: Final answer
   x = 103.86