Finding the Fourth Proportional to 89.15, 133.00 and 76.16

Step by Step Solution

1. Step 1: Write the proportion equation
   89.15 : 133.00 = 76.16 : x
2. Step 2: Convert to fraction form
   89.15/133.00 = 76.16/x
3. Step 3: Cross multiply
   89.15x = 133.00 × 76.16
4. Step 4: Simplify right side
   89.15x = 10,128.42
5. Step 5: Solve for x
   x = 10,128.42/89.15
6. Step 6: Final answer
   x = 113.62