Finding the Fourth Proportional to 12,766.93, 17,613.53 and 7,919.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,766.93 : 17,613.53 = 7,919.42 : x
2. Step 2: Convert to fraction form
   12,766.93/17,613.53 = 7,919.42/x
3. Step 3: Cross multiply
   12,766.93x = 17,613.53 × 7,919.42
4. Step 4: Simplify right side
   12,766.93x = 139,488,814.09
5. Step 5: Solve for x
   x = 139,488,814.09/12,766.93
6. Step 6: Final answer
   x = 10,925.79