Finding the Fourth Proportional to 102.84, 141.91 and 67.89

Step by Step Solution

1. Step 1: Write the proportion equation
   102.84 : 141.91 = 67.89 : x
2. Step 2: Convert to fraction form
   102.84/141.91 = 67.89/x
3. Step 3: Cross multiply
   102.84x = 141.91 × 67.89
4. Step 4: Simplify right side
   102.84x = 9,634.27
5. Step 5: Solve for x
   x = 9,634.27/102.84
6. Step 6: Final answer
   x = 93.68