Finding the Fourth Proportional to 11,923.76, 16,443.42 and 7,142.92

Step by Step Solution

1. Step 1: Write the proportion equation
   11,923.76 : 16,443.42 = 7,142.92 : x
2. Step 2: Convert to fraction form
   11,923.76/16,443.42 = 7,142.92/x
3. Step 3: Cross multiply
   11,923.76x = 16,443.42 × 7,142.92
4. Step 4: Simplify right side
   11,923.76x = 117,454,033.59
5. Step 5: Solve for x
   x = 117,454,033.59/11,923.76
6. Step 6: Final answer
   x = 9,850.42