Finding the Fourth Proportional to 12,888.50, 17,786.17 and 7,514.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,888.50 : 17,786.17 = 7,514.13 : x
2. Step 2: Convert to fraction form
   12,888.50/17,786.17 = 7,514.13/x
3. Step 3: Cross multiply
   12,888.50x = 17,786.17 × 7,514.13
4. Step 4: Simplify right side
   12,888.50x = 133,647,593.58
5. Step 5: Solve for x
   x = 133,647,593.58/12,888.50
6. Step 6: Final answer
   x = 10,369.52