Finding the Fourth Proportional to 12,714.98, 17,555.34 and 7,936.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,714.98 : 17,555.34 = 7,936.78 : x
2. Step 2: Convert to fraction form
   12,714.98/17,555.34 = 7,936.78/x
3. Step 3: Cross multiply
   12,714.98x = 17,555.34 × 7,936.78
4. Step 4: Simplify right side
   12,714.98x = 139,332,871.41
5. Step 5: Solve for x
   x = 139,332,871.41/12,714.98
6. Step 6: Final answer
   x = 10,958.17