Finding the Fourth Proportional to 69.35, 103.82 and 57.69

Step by Step Solution

1. Step 1: Write the proportion equation
   69.35 : 103.82 = 57.69 : x
2. Step 2: Convert to fraction form
   69.35/103.82 = 57.69/x
3. Step 3: Cross multiply
   69.35x = 103.82 × 57.69
4. Step 4: Simplify right side
   69.35x = 5,989.09
5. Step 5: Solve for x
   x = 5,989.09/69.35
6. Step 6: Final answer
   x = 86.37