Finding the Fourth Proportional to 3,939.23, 5,435.98 and 2,259.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.23 : 5,435.98 = 2,259.50 : x
2. Step 2: Convert to fraction form
   3,939.23/5,435.98 = 2,259.50/x
3. Step 3: Cross multiply
   3,939.23x = 5,435.98 × 2,259.50
4. Step 4: Simplify right side
   3,939.23x = 12,282,563.98
5. Step 5: Solve for x
   x = 12,282,563.98/3,939.23
6. Step 6: Final answer
   x = 3,118.01