Finding the Fourth Proportional to 89.33, 123.35 and 61.69

Step by Step Solution

1. Step 1: Write the proportion equation
   89.33 : 123.35 = 61.69 : x
2. Step 2: Convert to fraction form
   89.33/123.35 = 61.69/x
3. Step 3: Cross multiply
   89.33x = 123.35 × 61.69
4. Step 4: Simplify right side
   89.33x = 7,609.46
5. Step 5: Solve for x
   x = 7,609.46/89.33
6. Step 6: Final answer
   x = 85.18