Finding the Fourth Proportional to 78.07, 107.33 and 69.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78.07 : 107.33 = 69.69 : x
2. Step 2: Convert to fraction form
   78.07/107.33 = 69.69/x
3. Step 3: Cross multiply
   78.07x = 107.33 × 69.69
4. Step 4: Simplify right side
   78.07x = 7,479.83
5. Step 5: Solve for x
   x = 7,479.83/78.07
6. Step 6: Final answer
   x = 95.82