Finding the Fourth Proportional to 22,405.05, 30,919.77 and 12,846.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,405.05 : 30,919.77 = 12,846.42 : x
2. Step 2: Convert to fraction form
   22,405.05/30,919.77 = 12,846.42/x
3. Step 3: Cross multiply
   22,405.05x = 30,919.77 × 12,846.42
4. Step 4: Simplify right side
   22,405.05x = 397,208,351.72
5. Step 5: Solve for x
   x = 397,208,351.72/22,405.05
6. Step 6: Final answer
   x = 17,728.52