Finding the Fourth Proportional to 5,899.14, 8,139.69 and 3,540.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,899.14 : 8,139.69 = 3,540.42 : x
2. Step 2: Convert to fraction form
   5,899.14/8,139.69 = 3,540.42/x
3. Step 3: Cross multiply
   5,899.14x = 8,139.69 × 3,540.42
4. Step 4: Simplify right side
   5,899.14x = 28,817,921.27
5. Step 5: Solve for x
   x = 28,817,921.27/5,899.14
6. Step 6: Final answer
   x = 4,885.11