Finding the Fourth Proportional to 7,780.27, 10,736.72 and 4,243.40

Step by Step Solution

1. Step 1: Write the proportion equation
   7,780.27 : 10,736.72 = 4,243.40 : x
2. Step 2: Convert to fraction form
   7,780.27/10,736.72 = 4,243.40/x
3. Step 3: Cross multiply
   7,780.27x = 10,736.72 × 4,243.40
4. Step 4: Simplify right side
   7,780.27x = 45,560,197.65
5. Step 5: Solve for x
   x = 45,560,197.65/7,780.27
6. Step 6: Final answer
   x = 5,855.86