Finding the Fourth Proportional to 2,105.74, 3,157.25 and 874.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.74 : 3,157.25 = 874.00 : x
2. Step 2: Convert to fraction form
   2,105.74/3,157.25 = 874.00/x
3. Step 3: Cross multiply
   2,105.74x = 3,157.25 × 874.00
4. Step 4: Simplify right side
   2,105.74x = 2,759,421.81
5. Step 5: Solve for x
   x = 2,759,421.81/2,105.74
6. Step 6: Final answer
   x = 1,310.43