Finding the Fourth Proportional to 76.72, 105.83 and 47.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76.72 : 105.83 = 47.56 : x
2. Step 2: Convert to fraction form
   76.72/105.83 = 47.56/x
3. Step 3: Cross multiply
   76.72x = 105.83 × 47.56
4. Step 4: Simplify right side
   76.72x = 5,033.27
5. Step 5: Solve for x
   x = 5,033.27/76.72
6. Step 6: Final answer
   x = 65.61