Finding the Fourth Proportional to 89.58, 123.63 and 65.01

Step by Step Solution

1. Step 1: Write the proportion equation
   89.58 : 123.63 = 65.01 : x
2. Step 2: Convert to fraction form
   89.58/123.63 = 65.01/x
3. Step 3: Cross multiply
   89.58x = 123.63 × 65.01
4. Step 4: Simplify right side
   89.58x = 8,036.41
5. Step 5: Solve for x
   x = 8,036.41/89.58
6. Step 6: Final answer
   x = 89.72