Finding the Fourth Proportional to 12,691.99, 17,514.57 and 7,026.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.99 : 17,514.57 = 7,026.55 : x
2. Step 2: Convert to fraction form
   12,691.99/17,514.57 = 7,026.55/x
3. Step 3: Cross multiply
   12,691.99x = 17,514.57 × 7,026.55
4. Step 4: Simplify right side
   12,691.99x = 123,067,001.83
5. Step 5: Solve for x
   x = 123,067,001.83/12,691.99
6. Step 6: Final answer
   x = 9,696.43