Finding the Fourth Proportional to 89.48, 123.43 and 73.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89.48 : 123.43 = 73.09 : x
2. Step 2: Convert to fraction form
   89.48/123.43 = 73.09/x
3. Step 3: Cross multiply
   89.48x = 123.43 × 73.09
4. Step 4: Simplify right side
   89.48x = 9,021.50
5. Step 5: Solve for x
   x = 9,021.50/89.48
6. Step 6: Final answer
   x = 100.82