Finding the Fourth Proportional to 2,308.63, 3,185.87 and 1,260.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.63 : 3,185.87 = 1,260.70 : x
2. Step 2: Convert to fraction form
   2,308.63/3,185.87 = 1,260.70/x
3. Step 3: Cross multiply
   2,308.63x = 3,185.87 × 1,260.70
4. Step 4: Simplify right side
   2,308.63x = 4,016,420.01
5. Step 5: Solve for x
   x = 4,016,420.01/2,308.63
6. Step 6: Final answer
   x = 1,739.74