Finding the Fourth Proportional to 89.45, 123.17 and 69.86

Step by Step Solution

1. Step 1: Write the proportion equation
   89.45 : 123.17 = 69.86 : x
2. Step 2: Convert to fraction form
   89.45/123.17 = 69.86/x
3. Step 3: Cross multiply
   89.45x = 123.17 × 69.86
4. Step 4: Simplify right side
   89.45x = 8,605.01
5. Step 5: Solve for x
   x = 8,605.01/89.45
6. Step 6: Final answer
   x = 96.19