Finding the Fourth Proportional to 2,257.82, 3,115.35 and 1,313.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.82 : 3,115.35 = 1,313.72 : x
2. Step 2: Convert to fraction form
   2,257.82/3,115.35 = 1,313.72/x
3. Step 3: Cross multiply
   2,257.82x = 3,115.35 × 1,313.72
4. Step 4: Simplify right side
   2,257.82x = 4,092,697.60
5. Step 5: Solve for x
   x = 4,092,697.60/2,257.82
6. Step 6: Final answer
   x = 1,812.68