Finding the Fourth Proportional to 3,931.56, 5,423.30 and 2,457

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.56 : 5,423.30 = 2,457 : x
2. Step 2: Convert to fraction form
   3,931.56/5,423.30 = 2,457/x
3. Step 3: Cross multiply
   3,931.56x = 5,423.30 × 2,457
4. Step 4: Simplify right side
   3,931.56x = 13,325,048.10
5. Step 5: Solve for x
   x = 13,325,048.10/3,931.56
6. Step 6: Final answer
   x = 3,389.25