Finding the Fourth Proportional to 2,105.77, 3,159.79 and 874.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.77 : 3,159.79 = 874.03 : x
2. Step 2: Convert to fraction form
   2,105.77/3,159.79 = 874.03/x
3. Step 3: Cross multiply
   2,105.77x = 3,159.79 × 874.03
4. Step 4: Simplify right side
   2,105.77x = 2,761,752.01
5. Step 5: Solve for x
   x = 2,761,752.01/2,105.77
6. Step 6: Final answer
   x = 1,311.52