Finding the Fourth Proportional to 1,343.16, 1,853.55 and 871.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.16 : 1,853.55 = 871.23 : x
2. Step 2: Convert to fraction form
   1,343.16/1,853.55 = 871.23/x
3. Step 3: Cross multiply
   1,343.16x = 1,853.55 × 871.23
4. Step 4: Simplify right side
   1,343.16x = 1,614,868.37
5. Step 5: Solve for x
   x = 1,614,868.37/1,343.16
6. Step 6: Final answer
   x = 1,202.29