Finding the Fourth Proportional to 2,609.70, 3,600.99 and 1,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.70 : 3,600.99 = 1,561.50 : x
2. Step 2: Convert to fraction form
   2,609.70/3,600.99 = 1,561.50/x
3. Step 3: Cross multiply
   2,609.70x = 3,600.99 × 1,561.50
4. Step 4: Simplify right side
   2,609.70x = 5,622,945.89
5. Step 5: Solve for x
   x = 5,622,945.89/2,609.70
6. Step 6: Final answer
   x = 2,154.63