Finding the Fourth Proportional to 9,838.72, 13,563.12 and 7,949.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,838.72 : 13,563.12 = 7,949.92 : x
2. Step 2: Convert to fraction form
   9,838.72/13,563.12 = 7,949.92/x
3. Step 3: Cross multiply
   9,838.72x = 13,563.12 × 7,949.92
4. Step 4: Simplify right side
   9,838.72x = 107,825,718.95
5. Step 5: Solve for x
   x = 107,825,718.95/9,838.72
6. Step 6: Final answer
   x = 10,959.32