Finding the Fourth Proportional to 89.18, 123.12 and 61.59

Step by Step Solution

1. Step 1: Write the proportion equation
   89.18 : 123.12 = 61.59 : x
2. Step 2: Convert to fraction form
   89.18/123.12 = 61.59/x
3. Step 3: Cross multiply
   89.18x = 123.12 × 61.59
4. Step 4: Simplify right side
   89.18x = 7,582.96
5. Step 5: Solve for x
   x = 7,582.96/89.18
6. Step 6: Final answer
   x = 85.03