Finding the Fourth Proportional to 89.83, 123.99 and 65.23

Step by Step Solution

1. Step 1: Write the proportion equation
   89.83 : 123.99 = 65.23 : x
2. Step 2: Convert to fraction form
   89.83/123.99 = 65.23/x
3. Step 3: Cross multiply
   89.83x = 123.99 × 65.23
4. Step 4: Simplify right side
   89.83x = 8,087.87
5. Step 5: Solve for x
   x = 8,087.87/89.83
6. Step 6: Final answer
   x = 90.04