Finding the Fourth Proportional to 89.48, 123.46 and 61.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89.48 : 123.46 = 61.96 : x
2. Step 2: Convert to fraction form
   89.48/123.46 = 61.96/x
3. Step 3: Cross multiply
   89.48x = 123.46 × 61.96
4. Step 4: Simplify right side
   89.48x = 7,649.58
5. Step 5: Solve for x
   x = 7,649.58/89.48
6. Step 6: Final answer
   x = 85.49