Finding the Fourth Proportional to 21,964.33, 30,309.56 and 12,406.17

Step by Step Solution

1. Step 1: Write the proportion equation
   21,964.33 : 30,309.56 = 12,406.17 : x
2. Step 2: Convert to fraction form
   21,964.33/30,309.56 = 12,406.17/x
3. Step 3: Cross multiply
   21,964.33x = 30,309.56 × 12,406.17
4. Step 4: Simplify right side
   21,964.33x = 376,025,491.95
5. Step 5: Solve for x
   x = 376,025,491.95/21,964.33
6. Step 6: Final answer
   x = 17,119.83