Finding the Fourth Proportional to 89.71, 123.83 and 67.88

Step by Step Solution

1. Step 1: Write the proportion equation
   89.71 : 123.83 = 67.88 : x
2. Step 2: Convert to fraction form
   89.71/123.83 = 67.88/x
3. Step 3: Cross multiply
   89.71x = 123.83 × 67.88
4. Step 4: Simplify right side
   89.71x = 8,405.58
5. Step 5: Solve for x
   x = 8,405.58/89.71
6. Step 6: Final answer
   x = 93.70