Finding the Fourth Proportional to 15,382.69, 21,223.25 and 9,411.37

Step by Step Solution

1. Step 1: Write the proportion equation
   15,382.69 : 21,223.25 = 9,411.37 : x
2. Step 2: Convert to fraction form
   15,382.69/21,223.25 = 9,411.37/x
3. Step 3: Cross multiply
   15,382.69x = 21,223.25 × 9,411.37
4. Step 4: Simplify right side
   15,382.69x = 199,739,793.53
5. Step 5: Solve for x
   x = 199,739,793.53/15,382.69
6. Step 6: Final answer
   x = 12,984.71