Finding the Fourth Proportional to 2,308.70, 3,185.97 and 1,260.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.70 : 3,185.97 = 1,260.74 : x
2. Step 2: Convert to fraction form
   2,308.70/3,185.97 = 1,260.74/x
3. Step 3: Cross multiply
   2,308.70x = 3,185.97 × 1,260.74
4. Step 4: Simplify right side
   2,308.70x = 4,016,679.82
5. Step 5: Solve for x
   x = 4,016,679.82/2,308.70
6. Step 6: Final answer
   x = 1,739.80