Finding the Fourth Proportional to 2,259.72, 3,118.68 and 1,315.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.72 : 3,118.68 = 1,315.68 : x
2. Step 2: Convert to fraction form
   2,259.72/3,118.68 = 1,315.68/x
3. Step 3: Cross multiply
   2,259.72x = 3,118.68 × 1,315.68
4. Step 4: Simplify right side
   2,259.72x = 4,103,184.90
5. Step 5: Solve for x
   x = 4,103,184.90/2,259.72
6. Step 6: Final answer
   x = 1,815.79