Finding the Fourth Proportional to 99.27, 136.89 and 76.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99.27 : 136.89 = 76.05 : x
2. Step 2: Convert to fraction form
   99.27/136.89 = 76.05/x
3. Step 3: Cross multiply
   99.27x = 136.89 × 76.05
4. Step 4: Simplify right side
   99.27x = 10,410.48
5. Step 5: Solve for x
   x = 10,410.48/99.27
6. Step 6: Final answer
   x = 104.87