Finding the Fourth Proportional to 9,389.28, 12,957.78 and 5,410.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.28 : 12,957.78 = 5,410.32 : x
2. Step 2: Convert to fraction form
   9,389.28/12,957.78 = 5,410.32/x
3. Step 3: Cross multiply
   9,389.28x = 12,957.78 × 5,410.32
4. Step 4: Simplify right side
   9,389.28x = 70,105,736.29
5. Step 5: Solve for x
   x = 70,105,736.29/9,389.28
6. Step 6: Final answer
   x = 7,466.57