Finding the Fourth Proportional to 9,389.91, 12,959.61 and 5,410.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.91 : 12,959.61 = 5,410.35 : x
2. Step 2: Convert to fraction form
   9,389.91/12,959.61 = 5,410.35/x
3. Step 3: Cross multiply
   9,389.91x = 12,959.61 × 5,410.35
4. Step 4: Simplify right side
   9,389.91x = 70,116,025.96
5. Step 5: Solve for x
   x = 70,116,025.96/9,389.91
6. Step 6: Final answer
   x = 7,467.17