Finding the Fourth Proportional to 89.98, 123.62 and 86.59

Step by Step Solution

1. Step 1: Write the proportion equation
   89.98 : 123.62 = 86.59 : x
2. Step 2: Convert to fraction form
   89.98/123.62 = 86.59/x
3. Step 3: Cross multiply
   89.98x = 123.62 × 86.59
4. Step 4: Simplify right side
   89.98x = 10,704.26
5. Step 5: Solve for x
   x = 10,704.26/89.98
6. Step 6: Final answer
   x = 118.96