Finding the Fourth Proportional to 22,018.65, 30,387.23 and 12,458.53

Step by Step Solution

1. Step 1: Write the proportion equation
   22,018.65 : 30,387.23 = 12,458.53 : x
2. Step 2: Convert to fraction form
   22,018.65/30,387.23 = 12,458.53/x
3. Step 3: Cross multiply
   22,018.65x = 30,387.23 × 12,458.53
4. Step 4: Simplify right side
   22,018.65x = 378,580,078.31
5. Step 5: Solve for x
   x = 378,580,078.31/22,018.65
6. Step 6: Final answer
   x = 17,193.61