Finding the Fourth Proportional to 22,406.92, 30,918.18 and 13,453

Step by Step Solution

1. Step 1: Write the proportion equation
   22,406.92 : 30,918.18 = 13,453 : x
2. Step 2: Convert to fraction form
   22,406.92/30,918.18 = 13,453/x
3. Step 3: Cross multiply
   22,406.92x = 30,918.18 × 13,453
4. Step 4: Simplify right side
   22,406.92x = 415,942,275.54
5. Step 5: Solve for x
   x = 415,942,275.54/22,406.92
6. Step 6: Final answer
   x = 18,563.12