Finding the Fourth Proportional to 89.55, 123.53 and 61.94

Step by Step Solution

1. Step 1: Write the proportion equation
   89.55 : 123.53 = 61.94 : x
2. Step 2: Convert to fraction form
   89.55/123.53 = 61.94/x
3. Step 3: Cross multiply
   89.55x = 123.53 × 61.94
4. Step 4: Simplify right side
   89.55x = 7,651.45
5. Step 5: Solve for x
   x = 7,651.45/89.55
6. Step 6: Final answer
   x = 85.44