Finding the Fourth Proportional to 3,938.15, 5,434.67 and 2,259.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.15 : 5,434.67 = 2,259.43 : x
2. Step 2: Convert to fraction form
   3,938.15/5,434.67 = 2,259.43/x
3. Step 3: Cross multiply
   3,938.15x = 5,434.67 × 2,259.43
4. Step 4: Simplify right side
   3,938.15x = 12,279,248.50
5. Step 5: Solve for x
   x = 12,279,248.50/3,938.15
6. Step 6: Final answer
   x = 3,118.02