Finding the Fourth Proportional to 2,308.12, 3,185.24 and 1,260.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.12 : 3,185.24 = 1,260.20 : x
2. Step 2: Convert to fraction form
   2,308.12/3,185.24 = 1,260.20/x
3. Step 3: Cross multiply
   2,308.12x = 3,185.24 × 1,260.20
4. Step 4: Simplify right side
   2,308.12x = 4,014,039.45
5. Step 5: Solve for x
   x = 4,014,039.45/2,308.12
6. Step 6: Final answer
   x = 1,739.09