Finding the Fourth Proportional to 9,390.20, 12,957.37 and 5,411.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390.20 : 12,957.37 = 5,411.48 : x
2. Step 2: Convert to fraction form
   9,390.20/12,957.37 = 5,411.48/x
3. Step 3: Cross multiply
   9,390.20x = 12,957.37 × 5,411.48
4. Step 4: Simplify right side
   9,390.20x = 70,118,470.29
5. Step 5: Solve for x
   x = 70,118,470.29/9,390.20
6. Step 6: Final answer
   x = 7,467.20