Finding the Fourth Proportional to 89.86, 123.98 and 58.35

Step by Step Solution

1. Step 1: Write the proportion equation
   89.86 : 123.98 = 58.35 : x
2. Step 2: Convert to fraction form
   89.86/123.98 = 58.35/x
3. Step 3: Cross multiply
   89.86x = 123.98 × 58.35
4. Step 4: Simplify right side
   89.86x = 7,233.69
5. Step 5: Solve for x
   x = 7,233.69/89.86
6. Step 6: Final answer
   x = 80.50