Finding the Fourth Proportional to 2,308.17, 3,185.19 and 1,260.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.17 : 3,185.19 = 1,260.21 : x
2. Step 2: Convert to fraction form
   2,308.17/3,185.19 = 1,260.21/x
3. Step 3: Cross multiply
   2,308.17x = 3,185.19 × 1,260.21
4. Step 4: Simplify right side
   2,308.17x = 4,014,008.29
5. Step 5: Solve for x
   x = 4,014,008.29/2,308.17
6. Step 6: Final answer
   x = 1,739.04