Finding the Fourth Proportional to 1,067.88, 1,473.72 and 713.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.88 : 1,473.72 = 713.20 : x
2. Step 2: Convert to fraction form
   1,067.88/1,473.72 = 713.20/x
3. Step 3: Cross multiply
   1,067.88x = 1,473.72 × 713.20
4. Step 4: Simplify right side
   1,067.88x = 1,051,057.10
5. Step 5: Solve for x
   x = 1,051,057.10/1,067.88
6. Step 6: Final answer
   x = 984.25