Finding the Fourth Proportional to 2,082.72, 2,868.03 and 1,861.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.72 : 2,868.03 = 1,861.59 : x
2. Step 2: Convert to fraction form
   2,082.72/2,868.03 = 1,861.59/x
3. Step 3: Cross multiply
   2,082.72x = 2,868.03 × 1,861.59
4. Step 4: Simplify right side
   2,082.72x = 5,339,095.97
5. Step 5: Solve for x
   x = 5,339,095.97/2,082.72
6. Step 6: Final answer
   x = 2,563.52