Finding the Fourth Proportional to 2,172.04, 3,258.67 and 874.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.04 : 3,258.67 = 874.42 : x
2. Step 2: Convert to fraction form
   2,172.04/3,258.67 = 874.42/x
3. Step 3: Cross multiply
   2,172.04x = 3,258.67 × 874.42
4. Step 4: Simplify right side
   2,172.04x = 2,849,446.22
5. Step 5: Solve for x
   x = 2,849,446.22/2,172.04
6. Step 6: Final answer
   x = 1,311.88