Finding the Fourth Proportional to 9,388.08, 12,951.18 and 5,406.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.08 : 12,951.18 = 5,406.89 : x
2. Step 2: Convert to fraction form
   9,388.08/12,951.18 = 5,406.89/x
3. Step 3: Cross multiply
   9,388.08x = 12,951.18 × 5,406.89
4. Step 4: Simplify right side
   9,388.08x = 70,025,589.44
5. Step 5: Solve for x
   x = 70,025,589.44/9,388.08
6. Step 6: Final answer
   x = 7,458.99