Finding the Fourth Proportional to 2,255.79, 3,112.78 and 1,260.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,255.79 : 3,112.78 = 1,260.93 : x
2. Step 2: Convert to fraction form
   2,255.79/3,112.78 = 1,260.93/x
3. Step 3: Cross multiply
   2,255.79x = 3,112.78 × 1,260.93
4. Step 4: Simplify right side
   2,255.79x = 3,924,975.82
5. Step 5: Solve for x
   x = 3,924,975.82/2,255.79
6. Step 6: Final answer
   x = 1,739.96