Finding the Fourth Proportional to 1,067.12, 1,473.12 and 872.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.12 : 1,473.12 = 872.72 : x
2. Step 2: Convert to fraction form
   1,067.12/1,473.12 = 872.72/x
3. Step 3: Cross multiply
   1,067.12x = 1,473.12 × 872.72
4. Step 4: Simplify right side
   1,067.12x = 1,285,621.29
5. Step 5: Solve for x
   x = 1,285,621.29/1,067.12
6. Step 6: Final answer
   x = 1,204.76