Finding the Fourth Proportional to 2,259.87, 3,118.49 and 1,420.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.87 : 3,118.49 = 1,420.31 : x
2. Step 2: Convert to fraction form
   2,259.87/3,118.49 = 1,420.31/x
3. Step 3: Cross multiply
   2,259.87x = 3,118.49 × 1,420.31
4. Step 4: Simplify right side
   2,259.87x = 4,429,199.84
5. Step 5: Solve for x
   x = 4,429,199.84/2,259.87
6. Step 6: Final answer
   x = 1,959.94