Finding the Fourth Proportional to 12,817.86, 17,690.43 and 7,514.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.86 : 17,690.43 = 7,514.40 : x
2. Step 2: Convert to fraction form
   12,817.86/17,690.43 = 7,514.40/x
3. Step 3: Cross multiply
   12,817.86x = 17,690.43 × 7,514.40
4. Step 4: Simplify right side
   12,817.86x = 132,932,967.19
5. Step 5: Solve for x
   x = 132,932,967.19/12,817.86
6. Step 6: Final answer
   x = 10,370.92