Finding the Fourth Proportional to 22,406.87, 30,920.36 and 12,335.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,406.87 : 30,920.36 = 12,335.05 : x
2. Step 2: Convert to fraction form
   22,406.87/30,920.36 = 12,335.05/x
3. Step 3: Cross multiply
   22,406.87x = 30,920.36 × 12,335.05
4. Step 4: Simplify right side
   22,406.87x = 381,404,186.62
5. Step 5: Solve for x
   x = 381,404,186.62/22,406.87
6. Step 6: Final answer
   x = 17,021.75