Finding the Fourth Proportional to 3,603.15, 5,403.65 and 1,870.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,603.15 : 5,403.65 = 1,870.83 : x
2. Step 2: Convert to fraction form
   3,603.15/5,403.65 = 1,870.83/x
3. Step 3: Cross multiply
   3,603.15x = 5,403.65 × 1,870.83
4. Step 4: Simplify right side
   3,603.15x = 10,109,301.18
5. Step 5: Solve for x
   x = 10,109,301.18/3,603.15
6. Step 6: Final answer
   x = 2,805.68