Finding the Fourth Proportional to 9,388.20, 12,956.94 and 5,409.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.20 : 12,956.94 = 5,409.48 : x
2. Step 2: Convert to fraction form
   9,388.20/12,956.94 = 5,409.48/x
3. Step 3: Cross multiply
   9,388.20x = 12,956.94 × 5,409.48
4. Step 4: Simplify right side
   9,388.20x = 70,090,307.79
5. Step 5: Solve for x
   x = 70,090,307.79/9,388.20
6. Step 6: Final answer
   x = 7,465.79