Finding the Fourth Proportional to 89.69, 123.67 and 71.24

Step by Step Solution

1. Step 1: Write the proportion equation
   89.69 : 123.67 = 71.24 : x
2. Step 2: Convert to fraction form
   89.69/123.67 = 71.24/x
3. Step 3: Cross multiply
   89.69x = 123.67 × 71.24
4. Step 4: Simplify right side
   89.69x = 8,810.38
5. Step 5: Solve for x
   x = 8,810.38/89.69
6. Step 6: Final answer
   x = 98.23