Finding the Fourth Proportional to 22,405.72, 30,917.89 and 12,334.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,405.72 : 30,917.89 = 12,334.05 : x
2. Step 2: Convert to fraction form
   22,405.72/30,917.89 = 12,334.05/x
3. Step 3: Cross multiply
   22,405.72x = 30,917.89 × 12,334.05
4. Step 4: Simplify right side
   22,405.72x = 381,342,801.15
5. Step 5: Solve for x
   x = 381,342,801.15/22,405.72
6. Step 6: Final answer
   x = 17,019.89