Finding the Fourth Proportional to 2,609.68, 3,601.47 and 1,561.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.68 : 3,601.47 = 1,561.54 : x
2. Step 2: Convert to fraction form
   2,609.68/3,601.47 = 1,561.54/x
3. Step 3: Cross multiply
   2,609.68x = 3,601.47 × 1,561.54
4. Step 4: Simplify right side
   2,609.68x = 5,623,839.46
5. Step 5: Solve for x
   x = 5,623,839.46/2,609.68
6. Step 6: Final answer
   x = 2,154.99