Finding the Fourth Proportional to 1,067.57, 1,473.44 and 619.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.57 : 1,473.44 = 619.71 : x
2. Step 2: Convert to fraction form
   1,067.57/1,473.44 = 619.71/x
3. Step 3: Cross multiply
   1,067.57x = 1,473.44 × 619.71
4. Step 4: Simplify right side
   1,067.57x = 913,105.50
5. Step 5: Solve for x
   x = 913,105.50/1,067.57
6. Step 6: Final answer
   x = 855.31