Finding the Fourth Proportional to 1,067.35, 1,603.59 and 1,038.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.35 : 1,603.59 = 1,038.79 : x
2. Step 2: Convert to fraction form
   1,067.35/1,603.59 = 1,038.79/x
3. Step 3: Cross multiply
   1,067.35x = 1,603.59 × 1,038.79
4. Step 4: Simplify right side
   1,067.35x = 1,665,793.26
5. Step 5: Solve for x
   x = 1,665,793.26/1,067.35
6. Step 6: Final answer
   x = 1,560.68