Finding the Fourth Proportional to 1,603.83, 2,405.27 and 679.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,603.83 : 2,405.27 = 679.37 : x
2. Step 2: Convert to fraction form
   1,603.83/2,405.27 = 679.37/x
3. Step 3: Cross multiply
   1,603.83x = 2,405.27 × 679.37
4. Step 4: Simplify right side
   1,603.83x = 1,634,068.28
5. Step 5: Solve for x
   x = 1,634,068.28/1,603.83
6. Step 6: Final answer
   x = 1,018.85