Finding the Fourth Proportional to 12,853.74, 17,738.58 and 7,111.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,853.74 : 17,738.58 = 7,111.27 : x
2. Step 2: Convert to fraction form
   12,853.74/17,738.58 = 7,111.27/x
3. Step 3: Cross multiply
   12,853.74x = 17,738.58 × 7,111.27
4. Step 4: Simplify right side
   12,853.74x = 126,143,831.80
5. Step 5: Solve for x
   x = 126,143,831.80/12,853.74
6. Step 6: Final answer
   x = 9,813.78