Finding the Fourth Proportional to 22,393.68, 30,900.96 and 12,960.24

Step by Step Solution

1. Step 1: Write the proportion equation
   22,393.68 : 30,900.96 = 12,960.24 : x
2. Step 2: Convert to fraction form
   22,393.68/30,900.96 = 12,960.24/x
3. Step 3: Cross multiply
   22,393.68x = 30,900.96 × 12,960.24
4. Step 4: Simplify right side
   22,393.68x = 400,483,857.83
5. Step 5: Solve for x
   x = 400,483,857.83/22,393.68
6. Step 6: Final answer
   x = 17,883.79