Finding the Fourth Proportional to 7,786.76, 10,743.72 and 4,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,786.76 : 10,743.72 = 4,640.72 : x
2. Step 2: Convert to fraction form
   7,786.76/10,743.72 = 4,640.72/x
3. Step 3: Cross multiply
   7,786.76x = 10,743.72 × 4,640.72
4. Step 4: Simplify right side
   7,786.76x = 49,858,596.28
5. Step 5: Solve for x
   x = 49,858,596.28/7,786.76
6. Step 6: Final answer
   x = 6,403.00