Finding the Fourth Proportional to 22,406.39, 30,921.56 and 12,335.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,406.39 : 30,921.56 = 12,335.57 : x
2. Step 2: Convert to fraction form
   22,406.39/30,921.56 = 12,335.57/x
3. Step 3: Cross multiply
   22,406.39x = 30,921.56 × 12,335.57
4. Step 4: Simplify right side
   22,406.39x = 381,435,006.21
5. Step 5: Solve for x
   x = 381,435,006.21/22,406.39
6. Step 6: Final answer
   x = 17,023.49