Finding the Fourth Proportional to 1,067.42, 1,471.82 and 870.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.42 : 1,471.82 = 870.32 : x
2. Step 2: Convert to fraction form
   1,067.42/1,471.82 = 870.32/x
3. Step 3: Cross multiply
   1,067.42x = 1,471.82 × 870.32
4. Step 4: Simplify right side
   1,067.42x = 1,280,954.38
5. Step 5: Solve for x
   x = 1,280,954.38/1,067.42
6. Step 6: Final answer
   x = 1,200.05