Finding the Fourth Proportional to 89.94, 123.94 and 64.02

Step by Step Solution

1. Step 1: Write the proportion equation
   89.94 : 123.94 = 64.02 : x
2. Step 2: Convert to fraction form
   89.94/123.94 = 64.02/x
3. Step 3: Cross multiply
   89.94x = 123.94 × 64.02
4. Step 4: Simplify right side
   89.94x = 7,934.64
5. Step 5: Solve for x
   x = 7,934.64/89.94
6. Step 6: Final answer
   x = 88.22