Finding the Fourth Proportional to 89.37, 123.27 and 61.74

Step by Step Solution

1. Step 1: Write the proportion equation
   89.37 : 123.27 = 61.74 : x
2. Step 2: Convert to fraction form
   89.37/123.27 = 61.74/x
3. Step 3: Cross multiply
   89.37x = 123.27 × 61.74
4. Step 4: Simplify right side
   89.37x = 7,610.69
5. Step 5: Solve for x
   x = 7,610.69/89.37
6. Step 6: Final answer
   x = 85.16