Finding the Fourth Proportional to 89.50, 123.53 and 57.98

Step by Step Solution

1. Step 1: Write the proportion equation
   89.50 : 123.53 = 57.98 : x
2. Step 2: Convert to fraction form
   89.50/123.53 = 57.98/x
3. Step 3: Cross multiply
   89.50x = 123.53 × 57.98
4. Step 4: Simplify right side
   89.50x = 7,162.29
5. Step 5: Solve for x
   x = 7,162.29/89.50
6. Step 6: Final answer
   x = 80.03