Finding the Fourth Proportional to 12,723.77, 17,556.72 and 7,942.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,723.77 : 17,556.72 = 7,942.91 : x
2. Step 2: Convert to fraction form
   12,723.77/17,556.72 = 7,942.91/x
3. Step 3: Cross multiply
   12,723.77x = 17,556.72 × 7,942.91
4. Step 4: Simplify right side
   12,723.77x = 139,451,359.07
5. Step 5: Solve for x
   x = 139,451,359.07/12,723.77
6. Step 6: Final answer
   x = 10,959.91