Finding the Fourth Proportional to 89.51, 123.53 and 83.97

Step by Step Solution

1. Step 1: Write the proportion equation
   89.51 : 123.53 = 83.97 : x
2. Step 2: Convert to fraction form
   89.51/123.53 = 83.97/x
3. Step 3: Cross multiply
   89.51x = 123.53 × 83.97
4. Step 4: Simplify right side
   89.51x = 10,372.39
5. Step 5: Solve for x
   x = 10,372.39/89.51
6. Step 6: Final answer
   x = 115.89