Finding the Fourth Proportional to 22,326, 30,810.24 and 12,390

Step by Step Solution

1. Step 1: Write the proportion equation
   22,326 : 30,810.24 = 12,390 : x
2. Step 2: Convert to fraction form
   22,326/30,810.24 = 12,390/x
3. Step 3: Cross multiply
   22,326x = 30,810.24 × 12,390
4. Step 4: Simplify right side
   22,326x = 381,738,873.60
5. Step 5: Solve for x
   x = 381,738,873.60/22,326
6. Step 6: Final answer
   x = 17,098.40