Finding the Fourth Proportional to 2,604.61, 3,906.10 and 872.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,604.61 : 3,906.10 = 872.83 : x
2. Step 2: Convert to fraction form
   2,604.61/3,906.10 = 872.83/x
3. Step 3: Cross multiply
   2,604.61x = 3,906.10 × 872.83
4. Step 4: Simplify right side
   2,604.61x = 3,409,340.36
5. Step 5: Solve for x
   x = 3,409,340.36/2,604.61
6. Step 6: Final answer
   x = 1,308.97