Finding the Fourth Proportional to 3,007.09, 4,510.92 and 815.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,007.09 : 4,510.92 = 815.83 : x
2. Step 2: Convert to fraction form
   3,007.09/4,510.92 = 815.83/x
3. Step 3: Cross multiply
   3,007.09x = 4,510.92 × 815.83
4. Step 4: Simplify right side
   3,007.09x = 3,680,143.86
5. Step 5: Solve for x
   x = 3,680,143.86/3,007.09
6. Step 6: Final answer
   x = 1,223.82