Finding the Fourth Proportional to 89.82, 123.90 and 67.92

Step by Step Solution

1. Step 1: Write the proportion equation
   89.82 : 123.90 = 67.92 : x
2. Step 2: Convert to fraction form
   89.82/123.90 = 67.92/x
3. Step 3: Cross multiply
   89.82x = 123.90 × 67.92
4. Step 4: Simplify right side
   89.82x = 8,415.29
5. Step 5: Solve for x
   x = 8,415.29/89.82
6. Step 6: Final answer
   x = 93.69