Finding the Fourth Proportional to 21,964.73, 30,310.67 and 12,405.00

Step by Step Solution

1. Step 1: Write the proportion equation
   21,964.73 : 30,310.67 = 12,405.00 : x
2. Step 2: Convert to fraction form
   21,964.73/30,310.67 = 12,405.00/x
3. Step 3: Cross multiply
   21,964.73x = 30,310.67 × 12,405.00
4. Step 4: Simplify right side
   21,964.73x = 376,004,006.03
5. Step 5: Solve for x
   x = 376,004,006.03/21,964.73
6. Step 6: Final answer
   x = 17,118.54