Finding the Fourth Proportional to 89.02, 123.02 and 85.98

Step by Step Solution

1. Step 1: Write the proportion equation
   89.02 : 123.02 = 85.98 : x
2. Step 2: Convert to fraction form
   89.02/123.02 = 85.98/x
3. Step 3: Cross multiply
   89.02x = 123.02 × 85.98
4. Step 4: Simplify right side
   89.02x = 10,577.26
5. Step 5: Solve for x
   x = 10,577.26/89.02
6. Step 6: Final answer
   x = 118.82