Finding the Fourth Proportional to 11,143.84, 16,685.52 and 7,238.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,143.84 : 16,685.52 = 7,238.56 : x
2. Step 2: Convert to fraction form
   11,143.84/16,685.52 = 7,238.56/x
3. Step 3: Cross multiply
   11,143.84x = 16,685.52 × 7,238.56
4. Step 4: Simplify right side
   11,143.84x = 120,779,137.65
5. Step 5: Solve for x
   x = 120,779,137.65/11,143.84
6. Step 6: Final answer
   x = 10,838.20