Finding the Fourth Proportional to 2,609.76, 3,601.44 and 1,561.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.76 : 3,601.44 = 1,561.62 : x
2. Step 2: Convert to fraction form
   2,609.76/3,601.44 = 1,561.62/x
3. Step 3: Cross multiply
   2,609.76x = 3,601.44 × 1,561.62
4. Step 4: Simplify right side
   2,609.76x = 5,624,080.73
5. Step 5: Solve for x
   x = 5,624,080.73/2,609.76
6. Step 6: Final answer
   x = 2,155.02