Finding the Fourth Proportional to 2,611.22, 3,604.15 and 1,615.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.22 : 3,604.15 = 1,615.91 : x
2. Step 2: Convert to fraction form
   2,611.22/3,604.15 = 1,615.91/x
3. Step 3: Cross multiply
   2,611.22x = 3,604.15 × 1,615.91
4. Step 4: Simplify right side
   2,611.22x = 5,823,966.03
5. Step 5: Solve for x
   x = 5,823,966.03/2,611.22
6. Step 6: Final answer
   x = 2,230.37