Finding the Fourth Proportional to 8,757.68, 12,085.46 and 4,778.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,757.68 : 12,085.46 = 4,778.72 : x
2. Step 2: Convert to fraction form
   8,757.68/12,085.46 = 4,778.72/x
3. Step 3: Cross multiply
   8,757.68x = 12,085.46 × 4,778.72
4. Step 4: Simplify right side
   8,757.68x = 57,753,029.41
5. Step 5: Solve for x
   x = 57,753,029.41/8,757.68
6. Step 6: Final answer
   x = 6,594.56