Finding the Fourth Proportional to 17,930.15, 26,890.65 and 12,714.15

Step by Step Solution

1. Step 1: Write the proportion equation
   17,930.15 : 26,890.65 = 12,714.15 : x
2. Step 2: Convert to fraction form
   17,930.15/26,890.65 = 12,714.15/x
3. Step 3: Cross multiply
   17,930.15x = 26,890.65 × 12,714.15
4. Step 4: Simplify right side
   17,930.15x = 341,891,757.70
5. Step 5: Solve for x
   x = 341,891,757.70/17,930.15
6. Step 6: Final answer
   x = 19,067.99