Finding the Fourth Proportional to 22,338.84, 30,826.56 and 13,391.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,338.84 : 30,826.56 = 13,391.28 : x
2. Step 2: Convert to fraction form
   22,338.84/30,826.56 = 13,391.28/x
3. Step 3: Cross multiply
   22,338.84x = 30,826.56 × 13,391.28
4. Step 4: Simplify right side
   22,338.84x = 412,807,096.40
5. Step 5: Solve for x
   x = 412,807,096.40/22,338.84
6. Step 6: Final answer
   x = 18,479.34