Finding the Fourth Proportional to 6,669.12, 10,003.92 and 5,111.97

Step by Step Solution

1. Step 1: Write the proportion equation
   6,669.12 : 10,003.92 = 5,111.97 : x
2. Step 2: Convert to fraction form
   6,669.12/10,003.92 = 5,111.97/x
3. Step 3: Cross multiply
   6,669.12x = 10,003.92 × 5,111.97
4. Step 4: Simplify right side
   6,669.12x = 51,139,738.92
5. Step 5: Solve for x
   x = 51,139,738.92/6,669.12
6. Step 6: Final answer
   x = 7,668.14