Finding the Fourth Proportional to 2,611.34, 3,603.84 and 1,617.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.34 : 3,603.84 = 1,617.20 : x
2. Step 2: Convert to fraction form
   2,611.34/3,603.84 = 1,617.20/x
3. Step 3: Cross multiply
   2,611.34x = 3,603.84 × 1,617.20
4. Step 4: Simplify right side
   2,611.34x = 5,828,112.03
5. Step 5: Solve for x
   x = 5,828,112.03/2,611.34
6. Step 6: Final answer
   x = 2,231.85