Finding the Fourth Proportional to 9,405.02, 12,976.31 and 7,409.39

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405.02 : 12,976.31 = 7,409.39 : x
2. Step 2: Convert to fraction form
   9,405.02/12,976.31 = 7,409.39/x
3. Step 3: Cross multiply
   9,405.02x = 12,976.31 × 7,409.39
4. Step 4: Simplify right side
   9,405.02x = 96,146,439.62
5. Step 5: Solve for x
   x = 96,146,439.62/9,405.02
6. Step 6: Final answer
   x = 10,222.88