Finding the Fourth Proportional to 89.71, 123.81 and 67.84

Step by Step Solution

1. Step 1: Write the proportion equation
   89.71 : 123.81 = 67.84 : x
2. Step 2: Convert to fraction form
   89.71/123.81 = 67.84/x
3. Step 3: Cross multiply
   89.71x = 123.81 × 67.84
4. Step 4: Simplify right side
   89.71x = 8,399.27
5. Step 5: Solve for x
   x = 8,399.27/89.71
6. Step 6: Final answer
   x = 93.63