Finding the Fourth Proportional to 12,993.60, 17,931.36 and 7,404.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,993.60 : 17,931.36 = 7,404.48 : x
2. Step 2: Convert to fraction form
   12,993.60/17,931.36 = 7,404.48/x
3. Step 3: Cross multiply
   12,993.60x = 17,931.36 × 7,404.48
4. Step 4: Simplify right side
   12,993.60x = 132,772,396.49
5. Step 5: Solve for x
   x = 132,772,396.49/12,993.60
6. Step 6: Final answer
   x = 10,218.29