Finding the Fourth Proportional to 9,379.25, 12,943.58 and 5,399.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.25 : 12,943.58 = 5,399.72 : x
2. Step 2: Convert to fraction form
   9,379.25/12,943.58 = 5,399.72/x
3. Step 3: Cross multiply
   9,379.25x = 12,943.58 × 5,399.72
4. Step 4: Simplify right side
   9,379.25x = 69,891,680.80
5. Step 5: Solve for x
   x = 69,891,680.80/9,379.25
6. Step 6: Final answer
   x = 7,451.73