Finding the Fourth Proportional to 9,405.46, 12,979.03 and 5,426.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,405.46 : 12,979.03 = 5,426.34 : x
2. Step 2: Convert to fraction form
   9,405.46/12,979.03 = 5,426.34/x
3. Step 3: Cross multiply
   9,405.46x = 12,979.03 × 5,426.34
4. Step 4: Simplify right side
   9,405.46x = 70,428,629.65
5. Step 5: Solve for x
   x = 70,428,629.65/9,405.46
6. Step 6: Final answer
   x = 7,488.06