Finding the Fourth Proportional to 67.36, 100.61 and 57.69

Step by Step Solution

1. Step 1: Write the proportion equation
   67.36 : 100.61 = 57.69 : x
2. Step 2: Convert to fraction form
   67.36/100.61 = 57.69/x
3. Step 3: Cross multiply
   67.36x = 100.61 × 57.69
4. Step 4: Simplify right side
   67.36x = 5,804.19
5. Step 5: Solve for x
   x = 5,804.19/67.36
6. Step 6: Final answer
   x = 86.17