Finding the Fourth Proportional to 91.82, 137.83 and 51.27

Step by Step Solution

1. Step 1: Write the proportion equation
   91.82 : 137.83 = 51.27 : x
2. Step 2: Convert to fraction form
   91.82/137.83 = 51.27/x
3. Step 3: Cross multiply
   91.82x = 137.83 × 51.27
4. Step 4: Simplify right side
   91.82x = 7,066.54
5. Step 5: Solve for x
   x = 7,066.54/91.82
6. Step 6: Final answer
   x = 76.96