Finding the Fourth Proportional to 2,308.58, 3,185.84 and 1,260.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.58 : 3,185.84 = 1,260.65 : x
2. Step 2: Convert to fraction form
   2,308.58/3,185.84 = 1,260.65/x
3. Step 3: Cross multiply
   2,308.58x = 3,185.84 × 1,260.65
4. Step 4: Simplify right side
   2,308.58x = 4,016,222.89
5. Step 5: Solve for x
   x = 4,016,222.89/2,308.58
6. Step 6: Final answer
   x = 1,739.69