Finding the Fourth Proportional to 1,067.42, 1,473.72 and 871.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.42 : 1,473.72 = 871.40 : x
2. Step 2: Convert to fraction form
   1,067.42/1,473.72 = 871.40/x
3. Step 3: Cross multiply
   1,067.42x = 1,473.72 × 871.40
4. Step 4: Simplify right side
   1,067.42x = 1,284,199.61
5. Step 5: Solve for x
   x = 1,284,199.61/1,067.42
6. Step 6: Final answer
   x = 1,203.09