Finding the Fourth Proportional to 3,938.46, 5,434.83 and 2,259.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.46 : 5,434.83 = 2,259.87 : x
2. Step 2: Convert to fraction form
   3,938.46/5,434.83 = 2,259.87/x
3. Step 3: Cross multiply
   3,938.46x = 5,434.83 × 2,259.87
4. Step 4: Simplify right side
   3,938.46x = 12,282,009.27
5. Step 5: Solve for x
   x = 12,282,009.27/3,938.46
6. Step 6: Final answer
   x = 3,118.48