Finding the Fourth Proportional to 2,131.92, 3,198.18 and 670.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.92 : 3,198.18 = 670.73 : x
2. Step 2: Convert to fraction form
   2,131.92/3,198.18 = 670.73/x
3. Step 3: Cross multiply
   2,131.92x = 3,198.18 × 670.73
4. Step 4: Simplify right side
   2,131.92x = 2,145,095.93
5. Step 5: Solve for x
   x = 2,145,095.93/2,131.92
6. Step 6: Final answer
   x = 1,006.18