Finding the Fourth Proportional to 22,460.49, 30,995.70 and 12,389.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,460.49 : 30,995.70 = 12,389.28 : x
2. Step 2: Convert to fraction form
   22,460.49/30,995.70 = 12,389.28/x
3. Step 3: Cross multiply
   22,460.49x = 30,995.70 × 12,389.28
4. Step 4: Simplify right side
   22,460.49x = 384,014,406.10
5. Step 5: Solve for x
   x = 384,014,406.10/22,460.49
6. Step 6: Final answer
   x = 17,097.33