Finding the Fourth Proportional to 22,213.37, 30,665.07 and 13,140.27

Step by Step Solution

1. Step 1: Write the proportion equation
   22,213.37 : 30,665.07 = 13,140.27 : x
2. Step 2: Convert to fraction form
   22,213.37/30,665.07 = 13,140.27/x
3. Step 3: Cross multiply
   22,213.37x = 30,665.07 × 13,140.27
4. Step 4: Simplify right side
   22,213.37x = 402,947,299.37
5. Step 5: Solve for x
   x = 402,947,299.37/22,213.37
6. Step 6: Final answer
   x = 18,139.86