Finding the Fourth Proportional to 89.53, 123.59 and 65.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89.53 : 123.59 = 65.09 : x
2. Step 2: Convert to fraction form
   89.53/123.59 = 65.09/x
3. Step 3: Cross multiply
   89.53x = 123.59 × 65.09
4. Step 4: Simplify right side
   89.53x = 8,044.47
5. Step 5: Solve for x
   x = 8,044.47/89.53
6. Step 6: Final answer
   x = 89.85