Finding the Fourth Proportional to 2,599.65, 3,586.50 and 1,603.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,599.65 : 3,586.50 = 1,603.20 : x
2. Step 2: Convert to fraction form
   2,599.65/3,586.50 = 1,603.20/x
3. Step 3: Cross multiply
   2,599.65x = 3,586.50 × 1,603.20
4. Step 4: Simplify right side
   2,599.65x = 5,749,868.78
5. Step 5: Solve for x
   x = 5,749,868.78/2,599.65
6. Step 6: Final answer
   x = 2,211.79