Finding the Fourth Proportional to 12,993.12, 17,931.12 and 7,404

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.12 : 17,931.12 = 7,404 : x
2. Step 2: Convert to fraction form
   12,993.12/17,931.12 = 7,404/x
3. Step 3: Cross multiply
   12,993.12x = 17,931.12 × 7,404
4. Step 4: Simplify right side
   12,993.12x = 132,762,012.48
5. Step 5: Solve for x
   x = 132,762,012.48/12,993.12
6. Step 6: Final answer
   x = 10,217.87