Finding the Fourth Proportional to 12,766.65, 17,613.09 and 9,417.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,766.65 : 17,613.09 = 9,417.48 : x
2. Step 2: Convert to fraction form
   12,766.65/17,613.09 = 9,417.48/x
3. Step 3: Cross multiply
   12,766.65x = 17,613.09 × 9,417.48
4. Step 4: Simplify right side
   12,766.65x = 165,870,922.81
5. Step 5: Solve for x
   x = 165,870,922.81/12,766.65
6. Step 6: Final answer
   x = 12,992.52