Finding the Fourth Proportional to 12,891.56, 19,304.49 and 8,495.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,891.56 : 19,304.49 = 8,495.69 : x
2. Step 2: Convert to fraction form
   12,891.56/19,304.49 = 8,495.69/x
3. Step 3: Cross multiply
   12,891.56x = 19,304.49 × 8,495.69
4. Step 4: Simplify right side
   12,891.56x = 164,004,897.98
5. Step 5: Solve for x
   x = 164,004,897.98/12,891.56
6. Step 6: Final answer
   x = 12,721.89