Finding the Fourth Proportional to 71.69, 106.95 and 69.89

Step by Step Solution

1. Step 1: Write the proportion equation
   71.69 : 106.95 = 69.89 : x
2. Step 2: Convert to fraction form
   71.69/106.95 = 69.89/x
3. Step 3: Cross multiply
   71.69x = 106.95 × 69.89
4. Step 4: Simplify right side
   71.69x = 7,474.39
5. Step 5: Solve for x
   x = 7,474.39/71.69
6. Step 6: Final answer
   x = 104.26