Finding the Fourth Proportional to 2,723.59, 4,085.16 and 874.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,723.59 : 4,085.16 = 874.21 : x
2. Step 2: Convert to fraction form
   2,723.59/4,085.16 = 874.21/x
3. Step 3: Cross multiply
   2,723.59x = 4,085.16 × 874.21
4. Step 4: Simplify right side
   2,723.59x = 3,571,287.72
5. Step 5: Solve for x
   x = 3,571,287.72/2,723.59
6. Step 6: Final answer
   x = 1,311.24