Finding the Fourth Proportional to 6,891.72, 9,506.72 and 4,238.61

Step by Step Solution

1. Step 1: Write the proportion equation
   6,891.72 : 9,506.72 = 4,238.61 : x
2. Step 2: Convert to fraction form
   6,891.72/9,506.72 = 4,238.61/x
3. Step 3: Cross multiply
   6,891.72x = 9,506.72 × 4,238.61
4. Step 4: Simplify right side
   6,891.72x = 40,295,257.27
5. Step 5: Solve for x
   x = 40,295,257.27/6,891.72
6. Step 6: Final answer
   x = 5,846.91