Finding the Fourth Proportional to 2,108.18, 3,159.57 and 874.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.18 : 3,159.57 = 874.82 : x
2. Step 2: Convert to fraction form
   2,108.18/3,159.57 = 874.82/x
3. Step 3: Cross multiply
   2,108.18x = 3,159.57 × 874.82
4. Step 4: Simplify right side
   2,108.18x = 2,764,055.03
5. Step 5: Solve for x
   x = 2,764,055.03/2,108.18
6. Step 6: Final answer
   x = 1,311.11