Finding the Fourth Proportional to 89.96, 123.62 and 84.69

Step by Step Solution

1. Step 1: Write the proportion equation
   89.96 : 123.62 = 84.69 : x
2. Step 2: Convert to fraction form
   89.96/123.62 = 84.69/x
3. Step 3: Cross multiply
   89.96x = 123.62 × 84.69
4. Step 4: Simplify right side
   89.96x = 10,468.95
5. Step 5: Solve for x
   x = 10,468.95/89.96
6. Step 6: Final answer
   x = 116.38