Finding the Fourth Proportional to 22,426.56, 30,938.36 and 13,458.65

Step by Step Solution

1. Step 1: Write the proportion equation
   22,426.56 : 30,938.36 = 13,458.65 : x
2. Step 2: Convert to fraction form
   22,426.56/30,938.36 = 13,458.65/x
3. Step 3: Cross multiply
   22,426.56x = 30,938.36 × 13,458.65
4. Step 4: Simplify right side
   22,426.56x = 416,388,336.83
5. Step 5: Solve for x
   x = 416,388,336.83/22,426.56
6. Step 6: Final answer
   x = 18,566.75