Finding the Fourth Proportional to 3,956.42, 5,457.87 and 3,674.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,956.42 : 5,457.87 = 3,674.99 : x
2. Step 2: Convert to fraction form
   3,956.42/5,457.87 = 3,674.99/x
3. Step 3: Cross multiply
   3,956.42x = 5,457.87 × 3,674.99
4. Step 4: Simplify right side
   3,956.42x = 20,057,617.67
5. Step 5: Solve for x
   x = 20,057,617.67/3,956.42
6. Step 6: Final answer
   x = 5,069.64