Finding the Fourth Proportional to 67.39, 100.91 and 57.82

Step by Step Solution

1. Step 1: Write the proportion equation
   67.39 : 100.91 = 57.82 : x
2. Step 2: Convert to fraction form
   67.39/100.91 = 57.82/x
3. Step 3: Cross multiply
   67.39x = 100.91 × 57.82
4. Step 4: Simplify right side
   67.39x = 5,834.62
5. Step 5: Solve for x
   x = 5,834.62/67.39
6. Step 6: Final answer
   x = 86.58