Finding the Fourth Proportional to 89.94, 123.96 and 65.34

Step by Step Solution

1. Step 1: Write the proportion equation
   89.94 : 123.96 = 65.34 : x
2. Step 2: Convert to fraction form
   89.94/123.96 = 65.34/x
3. Step 3: Cross multiply
   89.94x = 123.96 × 65.34
4. Step 4: Simplify right side
   89.94x = 8,099.55
5. Step 5: Solve for x
   x = 8,099.55/89.94
6. Step 6: Final answer
   x = 90.05