Finding the Fourth Proportional to 2,003.68, 2,765.58 and 1,603.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.68 : 2,765.58 = 1,603.78 : x
2. Step 2: Convert to fraction form
   2,003.68/2,765.58 = 1,603.78/x
3. Step 3: Cross multiply
   2,003.68x = 2,765.58 × 1,603.78
4. Step 4: Simplify right side
   2,003.68x = 4,435,381.89
5. Step 5: Solve for x
   x = 4,435,381.89/2,003.68
6. Step 6: Final answer
   x = 2,213.62