Finding the Fourth Proportional to 72.39, 107.94 and 69.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72.39 : 107.94 = 69.69 : x
2. Step 2: Convert to fraction form
   72.39/107.94 = 69.69/x
3. Step 3: Cross multiply
   72.39x = 107.94 × 69.69
4. Step 4: Simplify right side
   72.39x = 7,522.34
5. Step 5: Solve for x
   x = 7,522.34/72.39
6. Step 6: Final answer
   x = 103.91