Finding the Fourth Proportional to 12,815.18, 17,686.62 and 7,514.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815.18 : 17,686.62 = 7,514.54 : x
2. Step 2: Convert to fraction form
   12,815.18/17,686.62 = 7,514.54/x
3. Step 3: Cross multiply
   12,815.18x = 17,686.62 × 7,514.54
4. Step 4: Simplify right side
   12,815.18x = 132,906,813.45
5. Step 5: Solve for x
   x = 132,906,813.45/12,815.18
6. Step 6: Final answer
   x = 10,371.05