Finding the Fourth Proportional to 11,521.49, 15,896.81 and 7,043.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,521.49 : 15,896.81 = 7,043.60 : x
2. Step 2: Convert to fraction form
   11,521.49/15,896.81 = 7,043.60/x
3. Step 3: Cross multiply
   11,521.49x = 15,896.81 × 7,043.60
4. Step 4: Simplify right side
   11,521.49x = 111,970,828.27
5. Step 5: Solve for x
   x = 111,970,828.27/11,521.49
6. Step 6: Final answer
   x = 9,718.44