Finding the Fourth Proportional to 2,168.67, 3,253.61 and 871.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.67 : 3,253.61 = 871.05 : x
2. Step 2: Convert to fraction form
   2,168.67/3,253.61 = 871.05/x
3. Step 3: Cross multiply
   2,168.67x = 3,253.61 × 871.05
4. Step 4: Simplify right side
   2,168.67x = 2,834,056.99
5. Step 5: Solve for x
   x = 2,834,056.99/2,168.67
6. Step 6: Final answer
   x = 1,306.82