Finding the Fourth Proportional to 89.48, 123.31 and 84.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89.48 : 123.31 = 84.76 : x
2. Step 2: Convert to fraction form
   89.48/123.31 = 84.76/x
3. Step 3: Cross multiply
   89.48x = 123.31 × 84.76
4. Step 4: Simplify right side
   89.48x = 10,451.76
5. Step 5: Solve for x
   x = 10,451.76/89.48
6. Step 6: Final answer
   x = 116.81