Finding the Fourth Proportional to 22,156.73, 30,576.56 and 13,209.39

Step by Step Solution

1. Step 1: Write the proportion equation
   22,156.73 : 30,576.56 = 13,209.39 : x
2. Step 2: Convert to fraction form
   22,156.73/30,576.56 = 13,209.39/x
3. Step 3: Cross multiply
   22,156.73x = 30,576.56 × 13,209.39
4. Step 4: Simplify right side
   22,156.73x = 403,897,639.85
5. Step 5: Solve for x
   x = 403,897,639.85/22,156.73
6. Step 6: Final answer
   x = 18,229.12