Finding the Fourth Proportional to 22,357.50, 30,853.41 and 12,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,357.50 : 30,853.41 = 12,421.50 : x
2. Step 2: Convert to fraction form
   22,357.50/30,853.41 = 12,421.50/x
3. Step 3: Cross multiply
   22,357.50x = 30,853.41 × 12,421.50
4. Step 4: Simplify right side
   22,357.50x = 383,245,632.32
5. Step 5: Solve for x
   x = 383,245,632.32/22,357.50
6. Step 6: Final answer
   x = 17,141.70