Finding the Fourth Proportional to 2,098.76, 3,145.37 and 865.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.76 : 3,145.37 = 865.48 : x
2. Step 2: Convert to fraction form
   2,098.76/3,145.37 = 865.48/x
3. Step 3: Cross multiply
   2,098.76x = 3,145.37 × 865.48
4. Step 4: Simplify right side
   2,098.76x = 2,722,254.83
5. Step 5: Solve for x
   x = 2,722,254.83/2,098.76
6. Step 6: Final answer
   x = 1,297.08