Finding the Fourth Proportional to 3,540.72, 5,311.76 and 1,899.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,540.72 : 5,311.76 = 1,899.10 : x
2. Step 2: Convert to fraction form
   3,540.72/5,311.76 = 1,899.10/x
3. Step 3: Cross multiply
   3,540.72x = 5,311.76 × 1,899.10
4. Step 4: Simplify right side
   3,540.72x = 10,087,540.64
5. Step 5: Solve for x
   x = 10,087,540.64/3,540.72
6. Step 6: Final answer
   x = 2,849.01