Finding the Fourth Proportional to 9,582.47, 13,223.81 and 5,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,582.47 : 13,223.81 = 5,390.72 : x
2. Step 2: Convert to fraction form
   9,582.47/13,223.81 = 5,390.72/x
3. Step 3: Cross multiply
   9,582.47x = 13,223.81 × 5,390.72
4. Step 4: Simplify right side
   9,582.47x = 71,285,876.63
5. Step 5: Solve for x
   x = 71,285,876.63/9,582.47
6. Step 6: Final answer
   x = 7,439.19