Finding the Fourth Proportional to 12,815.75, 17,685.34 and 7,514.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815.75 : 17,685.34 = 7,514.10 : x
2. Step 2: Convert to fraction form
   12,815.75/17,685.34 = 7,514.10/x
3. Step 3: Cross multiply
   12,815.75x = 17,685.34 × 7,514.10
4. Step 4: Simplify right side
   12,815.75x = 132,889,413.29
5. Step 5: Solve for x
   x = 132,889,413.29/12,815.75
6. Step 6: Final answer
   x = 10,369.23