Finding the Fourth Proportional to 12,993.36, 17,931.24 and 7,404

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.36 : 17,931.24 = 7,404 : x
2. Step 2: Convert to fraction form
   12,993.36/17,931.24 = 7,404/x
3. Step 3: Cross multiply
   12,993.36x = 17,931.24 × 7,404
4. Step 4: Simplify right side
   12,993.36x = 132,762,900.96
5. Step 5: Solve for x
   x = 132,762,900.96/12,993.36
6. Step 6: Final answer
   x = 10,217.75