Finding the Fourth Proportional to 3,938.18, 5,434.65 and 2,259.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.18 : 5,434.65 = 2,259.59 : x
2. Step 2: Convert to fraction form
   3,938.18/5,434.65 = 2,259.59/x
3. Step 3: Cross multiply
   3,938.18x = 5,434.65 × 2,259.59
4. Step 4: Simplify right side
   3,938.18x = 12,280,053.62
5. Step 5: Solve for x
   x = 12,280,053.62/3,938.18
6. Step 6: Final answer
   x = 3,118.21