Finding the Fourth Proportional to 2,611.38, 3,603.78 and 1,563.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.38 : 3,603.78 = 1,563.78 : x
2. Step 2: Convert to fraction form
   2,611.38/3,603.78 = 1,563.78/x
3. Step 3: Cross multiply
   2,611.38x = 3,603.78 × 1,563.78
4. Step 4: Simplify right side
   2,611.38x = 5,635,519.09
5. Step 5: Solve for x
   x = 5,635,519.09/2,611.38
6. Step 6: Final answer
   x = 2,158.06