Finding the Fourth Proportional to 2,104.86, 3,155.16 and 872.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.86 : 3,155.16 = 872.94 : x
2. Step 2: Convert to fraction form
   2,104.86/3,155.16 = 872.94/x
3. Step 3: Cross multiply
   2,104.86x = 3,155.16 × 872.94
4. Step 4: Simplify right side
   2,104.86x = 2,754,265.37
5. Step 5: Solve for x
   x = 2,754,265.37/2,104.86
6. Step 6: Final answer
   x = 1,308.53