Finding the Fourth Proportional to 22,353.76, 30,844.56 and 12,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,353.76 : 30,844.56 = 12,920.50 : x
2. Step 2: Convert to fraction form
   22,353.76/30,844.56 = 12,920.50/x
3. Step 3: Cross multiply
   22,353.76x = 30,844.56 × 12,920.50
4. Step 4: Simplify right side
   22,353.76x = 398,527,137.48
5. Step 5: Solve for x
   x = 398,527,137.48/22,353.76
6. Step 6: Final answer
   x = 17,828.19