Finding the Fourth Proportional to 2,168.42, 3,253.23 and 870.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.42 : 3,253.23 = 870.80 : x
2. Step 2: Convert to fraction form
   2,168.42/3,253.23 = 870.80/x
3. Step 3: Cross multiply
   2,168.42x = 3,253.23 × 870.80
4. Step 4: Simplify right side
   2,168.42x = 2,832,896.42
5. Step 5: Solve for x
   x = 2,832,896.42/2,168.42
6. Step 6: Final answer
   x = 1,306.44