Finding the Fourth Proportional to 89.56, 123.69 and 70.12

Step by Step Solution

1. Step 1: Write the proportion equation
   89.56 : 123.69 = 70.12 : x
2. Step 2: Convert to fraction form
   89.56/123.69 = 70.12/x
3. Step 3: Cross multiply
   89.56x = 123.69 × 70.12
4. Step 4: Simplify right side
   89.56x = 8,673.14
5. Step 5: Solve for x
   x = 8,673.14/89.56
6. Step 6: Final answer
   x = 96.84