Finding the Fourth Proportional to 1,343.28, 1,853.99 and 871.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.28 : 1,853.99 = 871.16 : x
2. Step 2: Convert to fraction form
   1,343.28/1,853.99 = 871.16/x
3. Step 3: Cross multiply
   1,343.28x = 1,853.99 × 871.16
4. Step 4: Simplify right side
   1,343.28x = 1,615,111.57
5. Step 5: Solve for x
   x = 1,615,111.57/1,343.28
6. Step 6: Final answer
   x = 1,202.36