Finding the Fourth Proportional to 3,900.72, 5,855.94 and 2,598.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.72 : 5,855.94 = 2,598.24 : x
2. Step 2: Convert to fraction form
   3,900.72/5,855.94 = 2,598.24/x
3. Step 3: Cross multiply
   3,900.72x = 5,855.94 × 2,598.24
4. Step 4: Simplify right side
   3,900.72x = 15,215,137.55
5. Step 5: Solve for x
   x = 15,215,137.55/3,900.72
6. Step 6: Final answer
   x = 3,900.60