Finding the Fourth Proportional to 89.34, 123.27 and 76.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89.34 : 123.27 = 76.28 : x
2. Step 2: Convert to fraction form
   89.34/123.27 = 76.28/x
3. Step 3: Cross multiply
   89.34x = 123.27 × 76.28
4. Step 4: Simplify right side
   89.34x = 9,402.42
5. Step 5: Solve for x
   x = 9,402.42/89.34
6. Step 6: Final answer
   x = 105.24