Finding the Fourth Proportional to 3,939.65, 5,439.89 and 2,683.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.65 : 5,439.89 = 2,683.34 : x
2. Step 2: Convert to fraction form
   3,939.65/5,439.89 = 2,683.34/x
3. Step 3: Cross multiply
   3,939.65x = 5,439.89 × 2,683.34
4. Step 4: Simplify right side
   3,939.65x = 14,597,061.02
5. Step 5: Solve for x
   x = 14,597,061.02/3,939.65
6. Step 6: Final answer
   x = 3,705.17