Finding the Fourth Proportional to 2,609.90, 3,601.41 and 1,561.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.90 : 3,601.41 = 1,561.94 : x
2. Step 2: Convert to fraction form
   2,609.90/3,601.41 = 1,561.94/x
3. Step 3: Cross multiply
   2,609.90x = 3,601.41 × 1,561.94
4. Step 4: Simplify right side
   2,609.90x = 5,625,186.34
5. Step 5: Solve for x
   x = 5,625,186.34/2,609.90
6. Step 6: Final answer
   x = 2,155.33