Finding the Fourth Proportional to 9,786.27, 13,422.02 and 9,384.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,786.27 : 13,422.02 = 9,384.41 : x
2. Step 2: Convert to fraction form
   9,786.27/13,422.02 = 9,384.41/x
3. Step 3: Cross multiply
   9,786.27x = 13,422.02 × 9,384.41
4. Step 4: Simplify right side
   9,786.27x = 125,957,738.71
5. Step 5: Solve for x
   x = 125,957,738.71/9,786.27
6. Step 6: Final answer
   x = 12,870.86