Finding the Fourth Proportional to 22,399.65, 30,911.94 and 12,328.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,399.65 : 30,911.94 = 12,328.02 : x
2. Step 2: Convert to fraction form
   22,399.65/30,911.94 = 12,328.02/x
3. Step 3: Cross multiply
   22,399.65x = 30,911.94 × 12,328.02
4. Step 4: Simplify right side
   22,399.65x = 381,083,014.56
5. Step 5: Solve for x
   x = 381,083,014.56/22,399.65
6. Step 6: Final answer
   x = 17,012.90