Finding the Fourth Proportional to 89.83, 123.98 and 62.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89.83 : 123.98 = 62.18 : x
2. Step 2: Convert to fraction form
   89.83/123.98 = 62.18/x
3. Step 3: Cross multiply
   89.83x = 123.98 × 62.18
4. Step 4: Simplify right side
   89.83x = 7,709.08
5. Step 5: Solve for x
   x = 7,709.08/89.83
6. Step 6: Final answer
   x = 85.82