Finding the Fourth Proportional to 2,308.76, 3,186.16 and 1,260.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.76 : 3,186.16 = 1,260.88 : x
2. Step 2: Convert to fraction form
   2,308.76/3,186.16 = 1,260.88/x
3. Step 3: Cross multiply
   2,308.76x = 3,186.16 × 1,260.88
4. Step 4: Simplify right side
   2,308.76x = 4,017,365.42
5. Step 5: Solve for x
   x = 4,017,365.42/2,308.76
6. Step 6: Final answer
   x = 1,740.05