Finding the Fourth Proportional to 89.73, 123.79 and 62.16

Step by Step Solution

1. Step 1: Write the proportion equation
   89.73 : 123.79 = 62.16 : x
2. Step 2: Convert to fraction form
   89.73/123.79 = 62.16/x
3. Step 3: Cross multiply
   89.73x = 123.79 × 62.16
4. Step 4: Simplify right side
   89.73x = 7,695.10
5. Step 5: Solve for x
   x = 7,695.10/89.73
6. Step 6: Final answer
   x = 85.76