Finding the Fourth Proportional to 12,897.47, 19,336.46 and 8,456.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,897.47 : 19,336.46 = 8,456.26 : x
2. Step 2: Convert to fraction form
   12,897.47/19,336.46 = 8,456.26/x
3. Step 3: Cross multiply
   12,897.47x = 19,336.46 × 8,456.26
4. Step 4: Simplify right side
   12,897.47x = 163,514,036.56
5. Step 5: Solve for x
   x = 163,514,036.56/12,897.47
6. Step 6: Final answer
   x = 12,677.99