Finding the Fourth Proportional to 76.29, 105.25 and 54.42

Step by Step Solution

1. Step 1: Write the proportion equation
   76.29 : 105.25 = 54.42 : x
2. Step 2: Convert to fraction form
   76.29/105.25 = 54.42/x
3. Step 3: Cross multiply
   76.29x = 105.25 × 54.42
4. Step 4: Simplify right side
   76.29x = 5,727.87
5. Step 5: Solve for x
   x = 5,727.87/76.29
6. Step 6: Final answer
   x = 75.08