Finding the Fourth Proportional to 2,105.75, 3,157.28 and 874.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.75 : 3,157.28 = 874.01 : x
2. Step 2: Convert to fraction form
   2,105.75/3,157.28 = 874.01/x
3. Step 3: Cross multiply
   2,105.75x = 3,157.28 × 874.01
4. Step 4: Simplify right side
   2,105.75x = 2,759,501.09
5. Step 5: Solve for x
   x = 2,759,501.09/2,105.75
6. Step 6: Final answer
   x = 1,310.46