Finding the Fourth Proportional to 2,308.40, 3,185.56 and 1,260.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.40 : 3,185.56 = 1,260.48 : x
2. Step 2: Convert to fraction form
   2,308.40/3,185.56 = 1,260.48/x
3. Step 3: Cross multiply
   2,308.40x = 3,185.56 × 1,260.48
4. Step 4: Simplify right side
   2,308.40x = 4,015,334.67
5. Step 5: Solve for x
   x = 4,015,334.67/2,308.40
6. Step 6: Final answer
   x = 1,739.44