Finding the Fourth Proportional to 2,308.51, 3,185.74 and 1,260.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.51 : 3,185.74 = 1,260.57 : x
2. Step 2: Convert to fraction form
   2,308.51/3,185.74 = 1,260.57/x
3. Step 3: Cross multiply
   2,308.51x = 3,185.74 × 1,260.57
4. Step 4: Simplify right side
   2,308.51x = 4,015,843.87
5. Step 5: Solve for x
   x = 4,015,843.87/2,308.51
6. Step 6: Final answer
   x = 1,739.59