Finding the Fourth Proportional to 2,616.05, 3,609.50 and 1,553.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.05 : 3,609.50 = 1,553.76 : x
2. Step 2: Convert to fraction form
   2,616.05/3,609.50 = 1,553.76/x
3. Step 3: Cross multiply
   2,616.05x = 3,609.50 × 1,553.76
4. Step 4: Simplify right side
   2,616.05x = 5,608,288.95
5. Step 5: Solve for x
   x = 5,608,288.95/2,616.05
6. Step 6: Final answer
   x = 2,143.80