Finding the Fourth Proportional to 2,485.30, 3,719.96 and 1,313.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.30 : 3,719.96 = 1,313.65 : x
2. Step 2: Convert to fraction form
   2,485.30/3,719.96 = 1,313.65/x
3. Step 3: Cross multiply
   2,485.30x = 3,719.96 × 1,313.65
4. Step 4: Simplify right side
   2,485.30x = 4,886,718.89
5. Step 5: Solve for x
   x = 4,886,718.89/2,485.30
6. Step 6: Final answer
   x = 1,966.25